Question

State whether true or false:

The deviation produced by a prism is independent of the angle of incidence and is same for all the colours of light.

• A. True
• B. False

Answer 1

The correct option is B False

Answer is B.

A prism is a wedge-shaped body made from a refracting medium bounded by two plane faces inclined to each other at some angle. The two plane faces are called are the refracting faces and the angle included between these two faces is called the angle of prism or the refracting angle.
The angle of deviation of a ray of light in passing through a prism not only depends upon its material but also upon the angle of incidence.
A ray of monochromatic light (light possessing one wave-length only), while passing through a prism suffers a change in its path, the phenomenon is known as deviation.
The deviation suffered by a ray depends upon the refractive index of the material of prism for that wavelength. So, different wave-lengths contained in the incident ray suffer different deviations. Hence, these constituent rays will emerge along different paths.
Therefore, the statement is false.