Foundation
Physics Foundation
Human Eye And Colorful World
Question

(a) Draw a neat and labelled diagram of the experimental set up for observing the scattering of light in a colloidal solution of sulpher to show how the sky appears blue, and the sun appears red at sunrise and sunset.
(b) Out of blue light and red light, which one is scattered more easily ?
(c) Which component of sunlight is scattered away when the sun appears red at sunrise or sunset?
(d) What causes the scattering of blue component of sunlight in the atmosphere?

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Solution
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(b) Blue light scatters more easily due to its smaller wavelength. (c) Shortest wavelength component i.e. blue light scatters away when the sun appears red at sunrise or sunset. (d) Gas molecules present in the air.

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