Light travels from material X with an index of refraction of to material Y with an…

PHYSICS · Single correct · GCSE · Physics · Waves · Waves

Problem

17. Light travels from material X with an index of refraction of

n=1.5

to material Y with an index of refraction of

n=2.0

. If the speed of light in material Y is

v

, what is the speed of light in material X ? (A)

0.56 v

(B)

0.75 v

(C)

1.33 v

(D)

1.78 v