Light of velocity 3 x 108ms-1 is incident on a material of reflective of index n. If the velocity of light is reduced to 2.4 x 108ms-1 in the material, what is n?

A.

2.33

B.

2.25

C.

1.33

D.

1.25

View answer & explanation

Correct answer is D

n = \(\frac{3 \times\ 10^8}{2.4 \times\ 10^8}\)

n = 1.25

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