Q32 of 60 Page 1

Four student S P, Q, R and S traced the path of a ray of light passing through a glass slab for an angle of incidence 40° and measured the angle of refraction. The values as measured by them were 18°; 22°; 25° and 30° respectively. The student who has performed the experiment methodically is

=μg


μg is refractive index of glass


Given i= 40°


r= 25°


sin 40°= 0.642


sin 25°= 0.422


sin 40°/ sin 25°= 0.642/0.422=1.52


The refractive index of glass is 1.5 hence verified.

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