Q. 113.7( 10 Votes )
Define Snell's law of refraction. A ray of light is incident on a glass slab at an angle of incidence of 60°. If the angle of refraction be 32.7°, calculate the refractive index of glass. (Given: sin 60° = 0.866 and sin 30° = 0.5).
Answer :
According to the Snell's law of refraction, the ratio of sine of angle of incidence to the sine of angle of refraction is constant for a given pair of media.
Given: Angle of incidence = 60o
Angle of refraction = 30o
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PREVIOUSGive three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials?NEXTThe speed of light in vacuum and in two different glasses is given in the table below:(a) Calculate the absolute refractive indexes of flint glass and crown glass.(b) Calculate the relative refractive index for light going from crown glass to flint glass.
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