Q3 of 20 Page 304

State the function of pupil of an eye.

Pupil controls the amount of light which is entering the eye. A person pupil’s become smaller in bright light & large in dim light. As shown in the diagram below:


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1

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.

 2

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

Name the two phenomenons involved in the formation of rainbow.

 5

List the factors on which scattering of light depend.