Question

Critical angle of light passing from glass to water is minimum for ?

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

Answer 1

Answer:

D. Violet colour

The critical angle of light passing from glass to water is minimum for violet colour. The critical angle is very low for violet colour because of the refractive index of violet colour is very high. Refractive Index means the amount of bending of light when passing from one medium to another medium. The formula for refractive index (n) = c/v (Where c is Light velocity in vacuum and v is the velocity of light in a medium).