Question

Critical angle of light passing from glass to air is maximum for :-

• A. Red
• B. Green
• C. Yellow
• D. Violet

Answer 1

Answer: (A)

${\theta }_C\propto \frac{1}{\mu }$ and $\mu \propto \frac{1}{\lambda }$
${\theta }_C$ is minimum for violet and maximum for red.