Q. Critical angle of light passing from glass of water is minimum for
A) Red colour
B) Green colour
C) Yellow colour
D) Violet colour
Explanation
(d) $\ _{a}\mu_{g} = \frac{1}{\sin C}$
$\Rightarrow \sin C\ = \ \frac{1}{\ _{a}\mu_{g}}$
As $\mu\ $for violet colour is maximum, so sin C is minimum and hence critical angle $C$ is minimum for violet colour.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.