Question

State whether the given statement is True or False.

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

• A. True
• B. False

Answer 1

Answer: (B)

$\mu =\frac{\sin \frac{A+{\delta }_m}{2}}{\sin \frac{A}{2}}$

Since $‘A^{\prime }$, the angle of prism, is same for all the colours and $\mu$ is different for different colours, above equation can only be satisfied if all the colours have different values of ${\delta }_m$ i.e., they come out along different paths and hence, the phenomenon of dispersion.