Question are concerned with the situation sketched in Figure Q18.17 , in which a beam of...

Question are concerned with the situation sketched in Figure Q18.17 , in which a beam of light in the air encounters a transparent block with index of refraction n = 1.53. Some of the light is reflected and some is refracted.

What is ?

A. 40°

B. 45°

C. 50°

D. 90°