Question

When white light passes through a glass prism, one gets spectrum on the other side of the prism. In the emergent beam, the ray which is deviating least is

• A. violet ray
• B. green ray
• C. red ray
• D. yellow ray

Answer 1

Answer: (C)

red ray

Answer 2

$\delta 8 (\mu - 1)$
$\mu_R$ is least, so $\delta_R$ is also least.