Question

Light travels at 1.90 x 10⁸ m/s in a crystal, what is the crystal’s index of refraction?

Answer 1

Answer:

Refractive index of crystal is 2

Explanation:

Refractive index of the crystal=speed of light in vacuum /speed of light in that crystal

=3.8×10*8/1.9×10*8

=2

Answer 2

Answer:

1.57

Explanation:

The refraction index is a unit less number that describes how light rays move from one medium to the next. It is helpful to apply the law of Snell.

Refraction Index = n = c/v

where n is the index of refraction,

c is the speed of light in a vacuum  = 3 x 10⁸ m/s

v is the speed of light in other medium

Therefore,

n =  3 x 10⁸ / 1.90 x 10⁸

n = 1.57

Therefore, the crystal’s index of refraction is 1.57.