Praktikum Klimatologi Acara 2

Summary

This video script covers a practical session on climatology in agriculture, focusing on measuring the duration of sunlight exposure. The session guides students through setting up and using the solarimeter tool, analyzing and recording the burning patterns on the special paper (kertas pias) as a result of sun exposure. Students learn to read and interpret these patterns, noting the times and intensity of sunlight. The practical experiment demonstrates the process of measuring sunlight intensity and provides insights into the seasonal variations in sunlight exposure across different geographical locations.

Takeaways

• 😀 The practical session focuses on measuring the duration of sunlight exposure using a sunbeam-stocker device.
• 😀 The primary instructional goal is for students to learn how to set up and use the sunbeam-stocker device.
• 😀 Students are also expected to analyze and record the burn marks left on the special paper (kertas pias).
• 😀 The sunbeam-stocker consists of several components, such as a lens, arc, and various screws, each with specific functions for accurate measurement.
• 😀 Three types of kertas pias are used, including curved long, curved short, and straight papers, each for different periods or locations (equinox, summer, winter).
• 😀 The device focuses sunlight onto the paper, creating burn marks that indicate the duration of exposure to the sun.
• 😀 The paper used in this experiment is durable, made of blue cardboard that does not expand when wet and dries quickly.
• 😀 The burn marks on the paper are analyzed by the length of the marks, indicating how long the sunlight was focused on that area.
• 😀 Data analysis involves reading the burn marks and recording them in a table, showing the time intervals and total duration of sunlight exposure.
• 😀 The practical demonstration involves observing how weather conditions (such as cloud cover) can affect the accuracy of the measurements by causing incomplete burn marks.
• 😀 By analyzing the burned areas, students learn to calculate the total sunlight exposure in minutes, providing insight into daily solar radiation.

Q & A

What is the purpose of the practical exercise described in the script?

The purpose of the practical exercise is to teach students how to measure solar radiation duration using a special tool, analyze the results from pias paper, and understand the significance of sunlight exposure.

What are the key components of the solar radiation measuring tool?

The key components include the arc and axis holder, lens, meridian arc, paper clamp, locking screw, tool frame, horizontal adjustment screw, burning point recess, and the water park indicator.

How does the pias paper work in the experiment?

The pias paper records the sunlight exposure as it burns when focused sunlight from the lens hits it. The paper burns in different patterns (long lines, short lines, or dots) to indicate the duration of solar radiation.

What are the different types of pias paper used in the experiment?

There are three types of pias paper: long curved paper (used during summer in the northern hemisphere and winter in the southern hemisphere), short curved paper (used during winter in the northern hemisphere and summer in the southern hemisphere), and straight pias paper (used during equinoxes).

How do you set up the pias paper on the solar radiation measuring tool?

To set up the pias paper, insert the blunt end of the curved paper into the paper clamp, ensuring it is securely held without tearing. The paper is placed in a way that sunlight will burn it at the focus point of the lens.

What weather conditions can affect the results of the experiment?

Cloudy weather can reduce or prevent the burning of the pias paper since the sunlight is obscured by the clouds, affecting the accuracy of the results.

How do you interpret the burn marks on the pias paper?

Long horizontal lines indicate 60 minutes of sunlight exposure, short lines indicate 30 minutes, and dots represent 6 minutes of exposure each. These marks help determine the total duration of sunlight the paper was exposed to.

How do you calculate the total sunlight exposure from the burn marks?

To calculate total exposure, you count the number of marks (lines or dots) and assign the corresponding duration for each. For example, one long line equals 60 minutes, while three dots (each 6 minutes) would add up to 18 minutes.

What is the significance of recording the pias paper at different times of the day?

Recording the pias paper at different times of the day allows for an analysis of how sunlight exposure varies throughout the day and under changing conditions, providing a more accurate measurement of solar radiation.

How do you create a table to record the data from the experiment?

The table is created by listing the time codes, the observed burn marks, and the corresponding duration of sunlight exposure. The total exposure time is calculated by adding the individual times from each observed mark.