Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.
Speed of light is

Options

A. same in medium - I and medium - II
B. Larger in medium - I than medium - II
C. Larger in medium - II than in medium - I
D. Different at b and d

Answer

B

Explanation

From the diagram, it clearly indicates that on entering medium-II, the ray bend towards normal and hence medium-II is density medium. Hence speed of light is larger in medium I that in medium-II.