Q5 of 70 Page 11

Why does the sky appear dark instead of blue to an astronaut?

The sky appears dark instead of blue to an astronaut because, there is no atmosphere in the outer space so there is no scattering of light. And because there is no scattering of light so no color is scattered. Thus, the sky appears dark to the astronaut.

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3

Name the:

a. Component of white light that deviates the least.


b. Component of white light that deviates the most, while passing through a glass prism.

 4

A person suffering from an eye defect uses lenses of power – 1D. Name the defect he is suffering from and the nature of lens used.

 6

State two properties of the image formed by the eye lens on the retina.

 7

List the factors on which scattering of light depend.