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A ray of light incident on a glass slab ...

A ray of light incident on a glass slab of refractive index `frac(3)(2)`, travels a distance of 6 cm in glass in time (t). What will be the distance travelled by the ray in the same time (t) if it travels in air?

A

2 cm

B

3 cm

C

6 cm

D

9 cm

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