An optical fiber made of glass with an index of refraction 1.50 is coated with a plastic with index of refraction 1.30. What is the critical angle of this fiber at the glass-plastic interface? 61.1° 60.1° 90.0° 50.2° 41.8°

option B

Explanation:

Given,

Refractive index of the glass, n₂ = 1.50

Refractive index of plastic, n₁ = 1.30

critical angle = ?

n₁ is the refractive index of the rare medium

n₂ is the refractive index of the denser medium.

The correct answer is option B

your answer is c! hope this : )

this would be about 43%