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Light propagates 4 cm distance in glass ...

Light propagates 4 cm distance in glass of refractive index 1.5 in time to. In the same time to, light propagates a distance of 4.8 cm in a medium. The refractive index of the medium is

A

1.25

B

`1.5`

C

`1.7`

D

`0.867`

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