A ray in benzene has a critical angle of 41.8 deg when trying to enter air. What is the index of refraction for benzene?

1.5

Explanation:

Data obtained from the question include:

C (critical angle) = 41.8°

n (refractive index od benzene) = ?

Using the formula n = 1/sineC, the refractive index of benzene can be achieved as shown below:

n = 1/sineC

n = 1/sine 41.8°

n = 1.5

Therefore, the refractive index of benzene is 1.5