Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?

A.

3333 x 10-8cm

B.

5000 x 10-8cm

C.

6666 x10-8cm

D.

750010-8cm

View answer & explanation

Correct answer is A

n = \(\frac{\text{wavelength in space}}{\text{wavelength in glass}}\)

1.5 = \(\frac{5000 \times 10^{-8}}{\lambda g}\)

\(\lambda\)g = 3333 x 10-8cm

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