Question

Critical angle of light passing from glass to water is minimum form which colour

Answer 1

Answer:

violet colour

Critical angle will be minimum for violet colour of the spectrum. We know that refractive index μ is given as c/v where c is the velocity of light and v is the velocity of the respective colour in the medium. In refraction , the velocity of the red colour is maximum and that of the violet colour is minimum.

Explanation:

Expert

Critical angle of the spectrum will be minimum at violent color. 

The refractive angle of glass = μ - c/v

c= velocity of light 

v= velocity of the color

In refraction violent color has the least refraction

μ= 1/ sinC

and C is the critical angle 

by substituting the first equation in this we have 

c/v = 1/ sin C

hence v is directly proportional to sin C

thus Critical angle is minimum for light with minimum v and that is violent 

Answer 2

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violet colour

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