Science 10 Quarter 2 Module 1- The Development of Electromagnetic Wave Theory.
Summary
TLDRIn this educational video, Sir Eduardo DiMaggi Jr., a science teacher at Don Pablo ES Billiard High School, introduces the development of electromagnetic wave theory. He discusses the importance of understanding electromagnetic waves in daily life, such as using cell phones and the internet. The video covers key scientists like Ampere, Hertz, Maxwell, and Oyster, who contributed to the theory. It also includes interactive activities to help students compare wavelengths, identify scientists, and understand the theory's significance. The lesson aims to deepen students' comprehension of electromagnetic waves and their applications.
Takeaways
- 🌟 The video is a lesson for students on the development of electromagnetic wave theory, taught by Sir Eduardo DiMaggi Jr.
- 📚 The main learning competency is to compare the relative wavelengths of different forms of electromagnetic waves.
- 🌐 Electromagnetic waves are a part of our daily life, used in radios, televisions, cell phones, and even the warmth from the sun.
- 🔍 The module aims to describe electromagnetic waves, identify key scientists, and understand their contributions to the theory.
- 🧐 Students are encouraged to keep an activity notebook to record concepts and activities related to the module.
- 🕵️♂️ Scientists like Ampere, Hertz, Maxwell, and Oyster are highlighted for their significant contributions to the field of electromagnetism.
- 📈 The timeline of electromagnetism includes discoveries from the early 1800s to the late 1800s, with key advancements in understanding electricity and magnetism.
- 🌈 Electromagnetic waves are transverse, meaning their oscillations are perpendicular to the direction of wave travel.
- 🚀 The speed of electromagnetic waves in a vacuum is a constant, approximately 300,000 kilometers per second, which is the speed of light.
- 🤔 The discovery of electromagnetic waves has significant implications for modern technology, including communication and medical imaging.
Q & A
What is the main topic of the video script?
-The main topic of the video script is the development of electromagnetic wave theory.
Who is the speaker in the video script?
-The speaker in the video script is Sir Eduardo Dimaggi Junior, a science teacher at Don Pablo ES Billiard High School.
What is the most essential learning competency for the students in this module?
-The most essential learning competency for the students is to compare the relative wavelengths of different forms of electromagnetic waves.
Which scientist formulated the electromagnetic wave theory?
-James Clerk Maxwell formulated the electromagnetic wave theory.
What is the speed of electromagnetic waves in a vacuum?
-The speed of electromagnetic waves in a vacuum is approximately 300,000 kilometers per second, which is the same as the speed of light.
What is the significance of electromagnetic waves in our daily lives?
-Electromagnetic waves are significant in our daily lives as they enable communication through devices like radios, televisions, cell phones, and the internet.
What is the difference between transverse and longitudinal waves as mentioned in the script?
-Transverse waves are waves where the oscillations are perpendicular to the direction of wave propagation, while longitudinal waves have displacements in the same or opposite direction as the wave propagation.
Which scientist discovered the connection between electricity and magnetism?
-Hans Christian Ørsted discovered the connection between electricity and magnetism.
What is the contribution of Michael Faraday to the development of electromagnetic theory?
-Michael Faraday contributed to the development of electromagnetic theory by discovering electromagnetic induction.
What is the Faraday effect mentioned in the script?
-The Faraday effect, discovered by Michael Faraday, is the influence of an external magnetic field on the propagation of light through a material.
Who demonstrated the existence of electromagnetic waves and their link to light?
-Heinrich Hertz demonstrated the existence of electromagnetic waves and their link to light.
Outlines
📚 Introduction to Electromagnetic Wave Theory
This paragraph introduces a video lesson by Sir Eduardo Dimaggi Jr., a science teacher at Don Pablo ES Billiard High School in Camarines Norte, Mercedes. The lesson focuses on the development of electromagnetic wave theory, aimed at students but open for anyone interested. The main learning competency is to compare the wavelengths of different electromagnetic waves. The teacher encourages students to download the video and use it for learning. The topic is introduced with a discussion on how electromagnetic waves are ubiquitous in daily life, from radio and television to cell phones and sunlight. The lesson aims to describe electromagnetic waves, identify key scientists who contributed to the theory, and create a concept map or comic strip of their contributions.
🔬 Early Discoveries in Electromagnetism
The second paragraph delves into the history of electromagnetism, starting with the discovery of ultraviolet radiation by Johann Ritter. It then discusses the pivotal work of Hans Christian Ørsted, who first demonstrated the connection between electricity and magnetism during a lecture. Ørsted's experiments showed that a compass needle was deflected by an electric current, indicating a magnetic field around a live wire. This discovery was foundational, leading to the concept of electromagnetism. The paragraph also mentions Ørsted's further experiments that confirmed the relationship between electricity and magnetism and his contributions to the development of the magnetic levitation train and other technologies.
🌐 Contributions to Electromagnetic Theory
This paragraph continues the historical narrative by discussing the contributions of André-Marie Ampère, who expanded on Ørsted's work by showing how a current-carrying coil behaves like a magnet and developed a mathematical theory of electrodynamics. It also covers the work of Michael Faraday, who discovered electromagnetic induction and laid the groundwork for electric power generation. The paragraph further explains how these discoveries led to practical applications like the telegraph and the development of electrical measurement techniques. It concludes with the mention of Peter Barlow's telegraphy system and its limitations, as well as Ohm's Law and its significance in electrical resistance.
🌐 The Evolution of Electromagnetic Understanding
The fourth paragraph discusses the advancements in the understanding of electromagnetism, particularly focusing on the work of James Clerk Maxwell. Maxwell's equations demonstrated the interconnected nature of electric and magnetic forces, predicting the existence of electromagnetic waves and their speed, which he equated with the speed of light. The paragraph also highlights Heinrich Hertz's experimental confirmation of electromagnetic waves and their properties, such as reflection and refraction. It touches on the discovery of X-rays by Wilhelm Conrad Röntgen and concludes with an activity for students to match scientific contributions with the scientists who made them, reinforcing the lesson's content.
🎓 Concluding the Electromagnetic Wave Theory Lesson
The final paragraph wraps up the lesson by encouraging students to reflect on what they have learned about electromagnetic waves and their significance in daily life. It prompts students to consider how the discovery of electromagnetic waves has impacted modern communication and technology. The teacher guides students to an activity where they correct statements about electromagnetic waves and to keep a record of the different types of electromagnetic waves they use in a day. The paragraph ends with a preview of the next module and a thank you note from Sir Eduardo Dimaggi Jr., inviting students to share their learnings and questions in the comment section.
Mindmap
Keywords
💡Electromagnetic Waves
💡Electromagnetic Wave Theory
💡Hertz
💡Maxwell's Equations
💡Electromagnetic Induction
💡Transverse Waves
💡Longitudinal Waves
💡Vacuum
💡Speed of Light
💡Electromagnetic Spectrum
Highlights
Introduction to the development of electromagnetic wave theory for students.
Essential learning competency: comparing the relative wavelengths of different electromagnetic waves.
Everyday experiences with electromagnetic waves through devices like radios and cellphones.
Electromagnetic waves are a natural occurrence, even felt as warmth from the sun.
Pretest questions to test knowledge on the nature and behavior of electromagnetic waves.
Fact or bluff activity to discern true statements about electromagnetic waves.
Timeline of electromagnetism and classical optics detailing key scientists' contributions.
Hans Christian Ørsted's discovery uniting electricity and magnetism.
Andre-Marie Ampère's work on the magnetic effect based on the direction of current.
Michael Faraday's principle behind electromagnetic induction leading to the first electric power generator.
James Clerk Maxwell's equations demonstrating electric and magnetic forces as aspects of electromagnetism.
Heinrich Hertz's experimental evidence of electromagnetic waves and their link to light.
Activity to match scientists with their contributions to the development of electromagnetic wave theory.
Concept webcomic activity to illustrate the significance of electromagnetic waves in daily life.
Discussion on the speed of electromagnetic waves and their ability to travel through a vacuum.
Review of key scientists' contributions to the understanding of electromagnetism.
Activity 'Connecting Ideas' to correct statements about electromagnetic waves with happy or sad faces.
Reflection on learning and the practical applications of electromagnetic waves in modern technology.
Vocabulary review defining key terms used in the module.
Additional enrichment activity to identify and encircle the names of scientists who contributed to EM wave theory.
Transcripts
okay uh good days this video was created
for
my students of
don pablo es billiard high school here
in camarines norte a district of
mercedes and
if if you find this is useful even you
are not my students
who is watching this video you are free
to download it or to use this in your
students hopefully you will learn from
this video lesson okay i am
sir eduardo dimaggi junior science
teacher science 10
so
our topic for today is the second
quarter or the quarter tom the module
one the development of electromagnetic
wave theory
these are the development theme of this
module so i'm not going to read it one
by one
this is indicated in your soft copy or
hard copy of the
self learning modules for these students
the most essential learning competency
compare the relative wavelengths of
different forms of electromagnetic waves
and then the main topic of this module
is the development of the
electromagnetic wave theory
to begin with
we all know that we are surrounded with
different types of waves and most of
them are invisible or cannot be seen by
our naked eye but we can perceive some
of them
if you have listened to a radio on the
television
spoken us on a cellular phone sent a
text message and a messenger or we are
experiencing the so-called
electromagnetic wave meaning in our
daily basis in our environment we are
experiencing
the electromagnetic wave and even now
that you are watching my video you are
also experiencing the electromagnetic
wave and actually taken and felt the
warm the sun on your skin then you have
experienced the electromagnetic wave
therefore we can say that the
electromagnetic wave
is
existing in our nature so in this module
you will learn how the electromagnetic
waves came to be okay
and our targets for this module describe
electromagnetic waves identify the
scientists with great contribution to
the development of electromagnetic wave
jury make a comic strip concept map of
the contributions of the scientists to
the development of electromagnetic
theory
before we proceed to the different
activities
included
in this module we have to answer this in
your answer sheet or in your notebook in
my students i am suggesting that you
have to provide your activity notebook
uh for you to be able to save the
concepts the activities you had made
says involving in this module so let us
start with
number one
okay in this
try this number one who among the
scientists below had formulated the
electromagnetic wave theory letter a
ampere letter b hertz
letter c maxwell letter d oyster
and number two
what can electromagnetic waves travel
true that mechanical waves cannot
letter a air
letter b wood
letter c water letter d vacuum and
number three which of the following
statements is incorrect again incorrect
about e m waves a
em waves can transfer energy through a
vacuum through a medium and vacuum
letter b em waves vary in speed
frequency and wavelength letter c am
waves have electric and magnetic fields
letter d am waves form when energy is
transferred through field
for number four an electromagnetic wave
is produced by a letter a oscillating
electric and magnetic wave
b dispersion of water wave letter c
an earthquake
letter d vibration through air and other
media
for number five electromagnetic waves
are blank waves rather than longitudinal
waves
letter a transverse letter b
compressional letter c shear letter d
seismic
okay as we proceed with the different
activities
lessons here in this module you will
find out
the answers in this
pretest so let us now proceed
to
do this okay activity
a fact or a bluff
in our directions release a statement
carefully with the fact if the statement
describes electromagnetic waves or if
the statement is correct and bluff if
the statement is incorrect number one
electromagnetic waves are formed when an
electric field comes in contact with a
magnetic field number two em waves are
compressional waves number three em
waves travel with a constant velocity of
three times ten raised to seven
meter per second in a vacuum
electromagnetic waves can split into a
range of elec of frequencies known as
the electromagnetic spectrum
the electric field and magnetic field of
an electromagnetic wave are
perpendicular
or at right angles to each other let us
now check if your answers are correct
number one
the answer
this is fact this is correct
electromagnetic waves are formed when an
electric field comes in contact with a
magnetic field
and number two
the answer is bluff by bluff because em
waves are transverse wave they are not
compressional waves
so number three
the answer is also bluff
because em waves travel with a constant
velocity of three times ten the exponent
is eight not seven meter per second in a
vacuum if we are going to convert to
kilometer
and not in scientific notation we're
going to convert in kilometer that is
300
000 kilometer per second that is the
speed
of electromagnetic waves in a vacuum
and in number four the answer is
fact that is correct number five also
correct
so
let us now proceed
to the timeline
of
electromagnetism and
classical optics so in this timeline we
are going to
discuss the different scientists who
contributed to the development or to the
discovery of electromagnetism and the
classical optics so
the number one is johan ritter
he discovered ultraviolet radiation from
the sun next is 1820 hans christian
oilstead he is adani's physicist and
chemist
united the separate sciences of
electricity and magnetism and when has
christians or sister discovery he united
the separate sciences of electricity and
magnetism that's why we call now as
electro magnetism
for your additional information hans
christian oyster accidentally discover
this conducting a lecture on his class
so he develops an experiment in which he
notices a compass needle is deflected
from magnetic north when an electric
current from the battery he was using
was switched on and off convincing him
that magnetic fields reject from all
sides
of the of a live wire just as light and
he confirming a direct relationship
between electricity and magnetism
therefore
with the discovery of hans christian
oyster he found out that the electricity
and magnetism are inseparable meaning
they are interrelated he also observed
that the movement of the compass needle
to one side of the other depends upon
the direction of the current following
intensive investigations he conducted
different investigation different
experiments as a scientist before
giving a conclusion
he conducted different kinds of
experiments he published his findings
proving that a changing electric current
produces a magnetic field as it flows
through a wire meaning if a wire
carrying an electricity or it is
connected to a source
a wire
can be
converted to magnet or it can produce
magnetic field or magnetism
and that is now currently used
in
different countries for example in the
magnetic levitation train that is
electricity uh to magnetism and
different applications nowadays
okay
in 1820 another scientist andrea marie
ampere professor of mathematics they
called polytechnic
a short time
after learning of airstrip discovery
that a magnetic needle is acted on by a
baltic current conducted experiments and
published a paper
and
analyzed the kami at the pc attempting
to give combined theory of electricity
and magnetism or he showed that a coil
of wire carrying a current behaves like
an ordinary magnet
this is just a continuation of the idea
of the experiment of oyster
he used also in telegraphy during that
time the communication is the telegraphy
he mathematically developed ampersal
describing the magnetic force
between two electric currents his
mathematical theory explains known
electromagnetic phenomena and predicts
new ones
his loss of electrodynamics includes the
fact that parallel parallel conductors
carrying current in the same direction
attract and those carrying currents in
the opposite direction repel one another
so that is just like the property of
magnetic
repulsion and attraction property
one of the first to develop electrical
measuring
techniques he built an instrument
utilizing a free moving needle
to measure the flow of electricity
contributing to the development of the
galvanometer
in 1821 he proposed a telegraphy system
utilizing one wire per galvanometer to
indicate easter and reported
experimenting successfully with such a
system however in 1824 there's another
scientist peter barlow reported its
maximum distance was only 200 feet
meaning it cannot travel
a long distance
so
meaning it is impractical so in 1826 he
published the memoir on the mathematical
theory of electrodynamic phenomena
uniquely deduced from experiment
from experience containing a
mathematical derivation of the
electrodynamic force law
following faraday's discovery of
electromagnetic induction in 1831 ampere
agreed that faraday deserve full credit
for the discovery in 1821 andrey marie
ampere announced his story of electro
dynamics predicting the force that one
current exerts upon another
so in 1826
uh other additional information for
ampere when you say ampere
just put in it in your mind that is the
unit of
current so in 1826 george simon um
stated his ohm's law
or electrical resistance in the user
published in the this landmark pamphlet
died the unit ohms of electrical
resistance has been named in his honor
capacity 31 michael fardi began
experiments leading to its discovery of
the law of electromagnetic induction
through the discovery may have been
anticipated by the work of
francisco
sante
his breakthrough came when he wrapped
two insulated coils of wire around the
massive iron ring bolted to chair
okay the discovery of michael faraday
about the electromagnetic induction
lead to the principle to construct the
so-called electrodynamo or the first
electric power generator okay in 1845
michael faraday discovered that light
propagation in a material can be
influenced by external magnetic fields
or the faraday effect in 1855 james
clerk maxwell submitted on faraday's
lines of force
for publication containing a
mathematical statement of ampere's
circle relating the curl of magnetic
field to the electrical
in 1861 the first continental telegraph
system spans north america by connecting
an existing network on the united states
to a small network in california by a
link system ohama and carson city via
salt lake city
the slower pani express system ceased
operation a month later
so in 1864 james clark maxwell publishes
papers on the dynamical theory of the
electromagnetic field in 1865 james
clark maxwell published his landmark
paper a dynamical theory of the
electromagnetic field in the maxwell's
equation demonstrated that electric and
magnetic forces are two complementary
aspects of electromagnetism so therefore
with the current contribution current
scientists they found out that
electricity and magnetism are two
inseparable
things that they are interconnected with
each other we can create magnet from
electricity we can create electricity
from magnetism so he showed that the
associated complementary electric and
magnetic fields of electromagnetism
traveled through space in a form of
waves at a constant velocity of
3 times 10 raised to 8 meter per second
this is included in our pre-test a while
ago
he also proposes that light is a form of
electromagnetic radiation and actually
that density
that three times 10 raised to eight
meter per second
is actually the speed of light in a
vacuum
and that waves of oscillating electric
and magnetic fields travel through empty
space at a speed that could be predicted
from simple electrical experiments using
available data he obtains a velocity of
310
million 740
000 meter per second and that is the
velocity of the electromagnetic waves
and the stage
this velocity is sounding seems we have
a strong reason to conclude that light
light itself including rigid heat
and other radiations if any is an
electromagnetic disturbance in the form
of waves propagated through the
electromagnetic field according to
electromagnetic loss
in 1873 james clerk maxwell published a
magnetism which states that light is an
electromagnetic phenomenon
and in 1887 henrich henrich hertz
invented
a device of the production and reception
of electromagnetic range waves his
receiver consists of a coil
with a spark gap so in 1888 henrich
hertz demonstrated the existence of
electromagnetic waves by building an
apparatus that produced and detected
uhf radio radio waves or microwaves in
the uhf region he also found that
radio waves be transmitted through
different types of materials that were
reflected by others the key to radar
radar this is the radio application
detection and ranging this experiment
explained reflection refraction
polarization interference and velocity
of electromagnetic waves in 1895 wilhelm
conrad jin discovers the so-called
x-rays
so we are now currently using this
medical area he named that x-rays
because he do not know what kind of race
is that so maybe if obviously he named
that as
frenchin array that should be today
called asteroidan race
but he named that as an x-ray
okay let's now proceed to this activity
one so
in your activity notebook you're now
going to answer based on the discussion
we're going to match
from this first
column
we have doing the number and then we
have the
underline you're going to put the answer
from the column b just put the letter
only
for example in number one
what is your answer is that letter a
contributed in the development the
developing equations that show the
relationship of electricity and
magnetism
c
the name of the scientist here at the
lower portion of their pictures so you
can identify you can go back to my
discussion about the timeline of the
different scientists who contributed to
the development of the electromagnetic
wave
theory so that is the explorer so an
activity to expanding your view
direction make a concept webcomic strips
of the contributions of the following
science and our guide questions
what insights did you learn about
electromagnetic waves so you can now
write jet down in your activity notebook
what are the insights
did you learn about em waves or you may
type here you may comment here
so i'm going to read
all your comments here what are your
insights to learn about electromagnetic
waves and number two
how significance it is the discovery of
em webs in our life so imagine if those
scientists did not discovered about the
electromagnetic waves
do you think you message someone
using your cell phone
can you call someone using our gadgets
our laptop our computer
or
can you be updated
in the different events happening
worldwide with the use of your gadget
keep this in mind
about electromagnetic waves these are
the different definitions
electromagnetic waves are disturbances
that transfer through film
electromagnetic waves are transverse
wings
next do not require a medium for
transmission
meaning even in a vacuum even without
anything
or any medium like air like water like
any materials electromagnetic waves can
travel remember that property of
electromagnetic wave
and trouble with the same speed in the
absence of matter or that's the
so-called vacuum and this speed is
absolute
the am waves travel at a constant speed
of 300 million meters per second speed
of light or if you are going to convert
to kilometer that is 300 000 kilometer
per second that is
the speed that's why even this within
the speed of second
we can receive
information where we can receive the
messages sent from the different places
going to us or we can send back our
message to them
because of this
speed of the electromagnetic waves
electromagnetic electromagnetic waves
are produced by accelerating electrons
electromagnetic waves are combination of
electric and magnetic fields that
oscillate perpendicular to each other
and to the direction of the wave
and scientists who did great
contributions to the development of
electromagnetic wave theory are as
follows we have andre ampere
andre mariampere he demonstrated the
magnetic effect based on the direction
of current we have michael faraday
he formulated the principle behind
electromagnetic induction henrich hertz
now henry's rudolph heard he showed
experimental evidence of electromagnetic
waves and their link to light
so james clerk maxwell he contributed in
developing equations showing the
relationship of electricity and
magnetism
and hence christian oyster he showed how
a current carrying wires behave like a
magnet so
let us be thankful with this great
scientists who contributed to the
development of the
electromagnetic wave
so you are now familiar with the
different scientists behind the
discovery of electromagnetic waves
let's check your understanding in the
succeeding activity so you're going to
apply what you have learned okay in this
activity entitled connecting ideas the
direction religious statement correct
carefully put a happy face of the
statement is correct and if the
statement is incorrect or wrong draw a
sad face or underline the words that
make it wrong and write the correct
answer so as simple as that we have one
to ten
so number one electromagnetic wave is
considered as longitudinal wave number
two
em waves do not require a medium to
propagate em waves are combination of
electric and magnetic fields that
oscillates perpendicular to each other
and to the direction of the wave number
four em waves are produced by
accelerating protons
em waves travel at a constant speed of
three hundred
thousand meter per second ampere showed
experimental evidence of em waves and
they were linked to light
faraday for number seven from faraday
formulated the principle behind
electromagnetic induction number eight
urstead show how a current wire
behaves like a magnet and number nine
maxwell demonstrated the magnetic effect
based on the direction of current number
10 hertz contributed in developing
equations showing the relationship of
electricity and congratulations you have
just finished the supplementary learning
modules about the development of
electromagnetic waves so reflect i have
learned that what have you learned
you may also type here in our video in
our comment section
you may type your learning
and you may also
write down i wish to ask my teacher
about what is your question and
reinforcement keep a record of the
different kinds of electromagnetic waves
you use in one day
which em waves do you use most often
so
based on this module
maybe this reinforcement can be
reinforced more in our next succeeding
modules the continuation of this
discussion and in our vocabulary release
the following terms used in this module
are defined as follows so
electromagnetic induction
production of electromotive force across
an electric conductor
in a changing magnetic field
electromagnetic wave a disturbance in a
field that carries energy and does not
require a medium to travel
longitudinal wave are waves in which the
displacement of the medium is in the
same direction or opposite direction to
and direction of propagation of the wave
transverse wave is a moving wave with
oscillations
are perpendicular to the direction of
the wave or path of propagation and wave
when i say wave a disturbance that
transfer energy or this is the carrier
of energy when it's a wave
and yes what have you learned we have
here
questions one two
five so you are going to answer this one
to five
identify what is asked or described in
each item then write the letter of the
correct answer number one
electromagnetic waves are produced by
blank
a current b voltage source
cna disturbances
d vibrating charge and number two
and the electromagnetic wave the
direction of propagation of the wave is
blank letter a always to the right b
cannot be determined
c parallel to the electric and magnetic
field direction letter d perpendicular
to the electric and magnetic field
direction
number three in the vacuum the speed of
magnet electromagnetic wave is letter a
zero
b always the same as the speed of light
c changing depending on the value of its
wavelength letter d none of the above
number four
he contributed in developing equations
showed the relationship of electricity
and magnetism
letter a and dremari ampere letter b
michael faraday
letter c james clark maxwell
letter d hans christian oyster number
five which of the following statements
is called is true about em waves letter
a
aim waves can transfer energy through a
medium only that will be em waves vary
in speed frequency and wavelength let us
see aim waves have electric and magnetic
field
em waves
form when energy is retained in the
field so for your additional enrichment
activity
okay we have the another activity here
my em heroes we are going to call this
as em wave scientists puzzle find answer
find and encircle the names of the five
scientists who contributed in the
development of em wave theory and
in the letter b identifying
contributions okay the direction from
your answer in figure one
write the names of the scientists in the
appropriate boxes in table one based on
their contributions
okay our next video lesson the module 2
the continuation
okay again thank you this is sir eduardo
di mali jr
thank you for watching
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