Question

A beam of light passes from air into a substance X. If the angle of incidence is 60° and angle of refraction is 30°. Calculate the refractive index of substance X ?


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Answer 1

Answer:

so using formula, refractive index.(n)=sini/sinr

n=sin60/sin30=√3/2/1/2=√3

also there is no unit Because it has no unit... unit less

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Answer 2

Explanation: Refractive index when angle of incidence and angle of refraction are given=sin i/ sin r. So given that sin i=45° and sin r=30. So refractive index of a substance==sin i =45°=1/√2 and sin r= 30°=1/2.