Calculate the angle of incidence of light ray incident on surface of a plastic slab of refractive index root over 3 , if the angle of refraction is 30 degree.
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Answer:
60 degree
Explanation:
u_1*sin(i) = u_2*sin(r)
1*sin(i) = 3^1/2 * 0.5
sin(i) = [3^1/2]/2
therefore i=60 degrees
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