Question

14. Kiran placed a prism in the path of sun light in his house. He observed seven colours on the
wall. What is this phenomenon called? Why does this take place?
15. The human eye focusses object at different distances by adjusting the focal length of the
eye lens. Name this phenomenon. Which parts of the eye play an important role for this
and how?
16. A prism with an angle A-60"produces an angle of minimum deviation of 30° Find the
angle of incidence of light ray on the prism.
17. How does the thickness of the eye lens changes when we shift looking from a distance tree
to reading a book?​

Answer 1

Explanation:

14.The phenomenon is called Despersion of light.

The phenomenon of splitting of white light into its component colours is called Despersion of light.

A band of seven colors formed when white light passes through a glass prism is called spectrum of white light