You want to form a pure spectrum of visible light on the wall of your room just like Rainbow. You are given a well constructed Prism a polychromatic light source. Do the paper project about the above experiment with clear diagram and explanation.
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Answer:
Explanation:
ight, Prisms, and the Rainbow Connection
White light is composed of all the visible colors in the electromagnetic spectrum, a fact that can be easily proven through the use of a prism. As light passes through a prism, it is bent, or refracted, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount. Violet has the highest frequency and is refracted the most. Red has the lowest frequency and is refracted the least. Because each color is refracted differently, each bends at a different angle, resulting in a fanning out and separation of white light into the colors of the spectrum.
Water droplets in the air can act in a manner similar to that of a prism, separating the colors of sunlight to produce a spectrum known as a rainbow. To be able to see a rainbow, you must be standing with the sun behind you. The sunlight shines into the water droplets in the air, bending as it moves from the air into the water, reflecting off the sides the drops, and bending again as it exits the drops. As a result, all of the colors in the white light of the sun separate into the individual bands of color characteristic of a rainbow.
As with the other activities, how much time you spend on this activity is up to you. However, it is recommended that you complete the activity in stages. The topic of rainbows can be the basis for an entire unit of study if you use this activity and the accompanying extensions as a launching point.
Required Materials
Science notebooks
Prisms
Flashlights
White paper
Transparency of visible spectrum
What will the students do?
Students working in pairs or in small groups will predict how to best make a rainbow using the materials from the Science, Optics and You package. While they are working, darken the classroom as much as possible. The most brilliant spectrums are produced when the room is very dark.
Students will compare the rainbows that they produce with other groups of students and identify the colors that they see in their science notebooks. You may want to introduce the term color spectrum to help students describe what they see. Have students compare their earlier predictions with what they observe. Students should also draw diagrams in their science notebooks that show how a prism separates the colors of light.
Depending on the amount of light in the classroom and the intensity of the flashlights, students will have varying degrees of success in projecting color spectrums. The following are alternative methods to demonstrate the separation of white light into the color spectrum.
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