PROPERTIES OF ELECTROMAGNETIC WAVES
Summary
TLDRThis educational script covers the properties of electromagnetic waves, detailing the wavelengths and characteristics of various types. It explains the visible spectrum's range from violet to red (0.4-0.7 micrometers), the longer wavelengths of infrared (0.7-100 micrometers) emitted by hot bodies, microwaves (10 micrometers to 10 meters), and radio waves (1 meter to 100 kilometers) that can travel vast distances. It also touches on harmful ultraviolet radiation (0.4-1 nm), X-rays (0.001-10 nm), and highly penetrating gamma rays (0.0001-0.1 nm), highlighting their sources and potential effects on human health.
Takeaways
- 🌈 The visible spectrum's wavelength ranges from 0.4 to 0.7 micrometers, correlating with colors from violet to red.
- 🔥 Infrared radiation has a longer wavelength than visible light, extending from 0.7 micrometers to 100 micrometers, and is emitted by hot bodies.
- 📡 Microwaves are produced by high-frequency electromagnetic oscillators and have wavelengths from 10 micrometers to 10 meters.
- 📻 Radio waves are generated by low-frequency oscillators and have wavelengths ranging from 1 meter to 100 kilometers, allowing long-distance transmission.
- 🌌 Radio waves can be received from extraterrestrial sources due to their long wavelength capabilities.
- 🌞 Ultraviolet (UV) radiation has a shorter wavelength than visible light, from 0.4 micrometers down to 1 nanometer, and can be harmful to human health.
- ⚡ X-rays have wavelengths shorter than UV light, from 0.001 nanometers to 10 nanometers or 0.001 to 100 angstroms, useful for imaging in medical and scientific fields.
- 💥 Gamma rays are the most penetrating form of electromagnetic radiation, with wavelengths from 0.0001 nanometers to 0.1 nanometers or 0.001 to 1 angstrom.
- ☢️ Gamma radiation is emitted by natural radioactive substances like uranium-235 and is produced by the decay of certain elementary particles.
- 🌟 The color of light emitted during electron transition is a characteristic feature of the atom of that particular substance.
Q & A
What is the wavelength range of the visible spectrum?
-The wavelength of the visible spectrum extends from 0.4 micrometers to 0.7 micrometers.
How are the colors of visible light related to the wavelength?
-The color of light emitted is a characteristic feature of an atom of a particular substance, and it varies from violet to red color as the wavelength changes.
What is the wavelength range of infrared radiations?
-Infrared radiations have a wavelength longer than visible light, extending from 0.7 micrometers to 100 micrometers.
Why are hot bodies considered sources of infrared radiations?
-Hot bodies emit infrared radiations, hence they are considered sources of these radiations.
How are microwaves produced?
-Microwaves are produced by high-frequency electromagnetic oscillators in electric circuits.
What is the wavelength range of microwaves?
-The wavelength of microwaves extends from 10 micrometers to 10 meters.
How are radio waves produced and what is their wavelength range?
-Radio waves are produced by low-frequency electromagnetic oscillators in electric circuits, and their wavelengths extend from 1 meter to 100 kilometers.
Why can radio waves travel and be received from long distances?
-Radio waves can travel and be received from long distances, including extraterrestrial sources, due to their long wavelength.
What is the wavelength range of ultraviolet radiations, and why are they harmful?
-The wavelength of UV radiations is from 0.4 micrometers to one nanometer. They are harmful to human bodies, and long-term exposure can lead to skin cancer.
What is the wavelength range of X-rays?
-The wavelength of X-rays extends from 0.001 nanometer to 10 nanometers or from 0.001 angstrom to 100 angstrom.
What is the significance of the spacing between atoms in a crystalline solid in relation to X-rays?
-The spacing between atoms in a crystalline solid, which ranges from 0.1 angstrom to 10 angstrom, is significant for X-rays as it relates to their ability to interact with and diffract off the crystal lattice.
What is the wavelength range of gamma rays and what are their sources?
-Gamma rays have wavelengths ranging from 0.0001 nanometer to 0.1 nanometer or from 0.001 angstrom to 1 angstrom. They are produced by the decay of certain elementary particles and are emitted by natural radioactive substances like uranium-235.
Why are gamma rays considered the most penetrating form of electromagnetic radiation?
-Gamma rays are considered the most penetrating form of electromagnetic radiation due to their extremely short wavelength, which allows them to pass through most materials.
Outlines
🌈 Properties of Electromagnetic Spectrum
This paragraph discusses the properties of different types of electromagnetic waves. It covers the wavelength range of visible light, which is from 0.4 micrometers to 0.7 micrometers, and how the color of light emitted during electron transition is a characteristic feature of the atom of a particular substance. The paragraph also explains that infrared radiation has a longer wavelength than visible light, extending from 0.7 micrometers to 100 micrometers, and is emitted by hot bodies. Microwaves are produced by high-frequency electromagnetic oscillators and have wavelengths from 10 micrometers to 10 meters. Radio waves, produced by low-frequency oscillators, have wavelengths from 1 meter to 100 kilometers and can travel long distances. Ultraviolet radiation has a shorter wavelength than visible light, from 0.4 micrometers to one nanometer, and can be harmful to human bodies. X-rays have wavelengths from 0.001 nanometer to 10 nanometers or 0.001 to 100 angstroms, and gamma rays have the shortest wavelengths, from 0.0001 nanometer to 0.1 nanometer or 0.001 to 1 angstrom, and are emitted by natural radioactive substances like uranium-235.
Mindmap
Keywords
💡Electromagnetic Spectrum
💡Wavelength
💡Visible Spectrum
💡Infrared Radiation
💡Microwaves
💡Radio Waves
💡Ultraviolet Radiation
💡X Rays
💡Gamma Rays
💡Electron Transition
💡Crystalline Solid
Highlights
Types of electromagnetic spectrum discussed.
Common features among electromagnetic spectrum radiations.
Wavelength of visible light spectrum ranges from 0.4 to 0.7 micrometers.
Visible light colors span from violet to red.
Electron transition determines the color of light emitted by atoms.
Infrared radiation has a longer wavelength than visible light.
Infrared radiation ranges from 0.7 micrometers to 100 micrometers.
Hot bodies are sources of infrared radiation.
Microwaves are produced by high-frequency electromagnetic oscillators.
Wavelength of microwaves ranges from 10 micrometers to 10 meters.
Radio waves are produced by low-frequency electromagnetic oscillators.
Wavelength of radio waves ranges from 1 meter to 100 kilometers.
Radio waves can be received from extraterrestrial sources.
Ultraviolet radiation has a shorter wavelength than visible light.
Wavelength of UV radiation ranges from 0.4 micrometers to 1 nanometer.
Long-term exposure to UV radiation can lead to skin cancer.
X-rays have a wavelength that ranges from 0.001 nanometer to 10 nanometers.
Gamma rays have the shortest wavelengths among electromagnetic radiations.
Gamma rays range from 0.0001 nanometer to 0.1 nanometer.
Natural radioactive substances emit gamma radiation.
Gamma radiation is the most penetrating type of electromagnetic radiation.
Transcripts
properties of electromagnetic waves in
our previous session we have learnt
about types of electromagnetic spectrum
we have learnt the common features among
radiations of electromagnetic spectrum
now let us learn the properties of
different radiations the wavelength of
the radiation of visible spectrum
extends from 0.4 micrometers to 0.7
micrometers the colors of radiation of
from violet color to red color during
transition of electrons the color of
light emitted is the characteristic
feature of an atom of that particular
substance the wavelength of the infrared
radiations is longer than visible light
it extends from 0.7 micrometers to 100
micrometers he travels in the form of
infrared radiations from the hot body
hence hot bodies became a source of
infrared radiations microwaves are
produced by high frequency
electromagnetic oscillators in electric
circuits the wavelength of microwaves
extends from 10 micrometers to 10 meters
radio waves are produced by
low-frequency electromagnetic
oscillators in electric circuits the
wavelengths of radio waves extend from 1
meter
to 100 kilometers the wavelengths of
radio waves extend from 1 meter
to 100 kilometers these waves can travel
and can be received from long distances
like extraterrestrial sources
ultraviolet radiations have shorter
wavelength
visible light the wavelength of UV
radiations is 0.4 micrometers to one
nanometer these radiations are harmful
to human bodies and its long-term
exposure can lead to skin cancer the
wavelength of x rays extends from 0.001
nanometer to 10 nanometers or 0.001
angstrom do 100 angstrom the spacing
between the atoms in a crystalline solid
from 0.1 angstrom to 10 angstrom gamma
rays are electromagnetic radiations with
shorter wavelengths ranges from 0.0001
nanometer to 0.1 nanometer or from 0.001
angstrom to 1 angstrom natural
radioactive substances like uranium-235
emits gamma radiations gamma radiations
are most penetrating electromagnetic
radiations produced by the decay of
certain elementary particles
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