A ray of light is normally incident on face ab of a plastic prism with an index of refraction n = 1.20 as shown.
-Determine the largest value of the angle $\alpha$ so that the ray is totally reflected at the face ac if the prism is immersed in air.
A)28°
B)34°
C)45°
D)56°
E)Total internal reflection will not occur for any value of $\alpha$.

Question

A ray of light is normally incident on face ab of a plastic prism with an index of refraction n = 1.20 as shown. 
-Determine the largest value of the angle $\alpha$ so that the ray is totally reflected at the face ac if the prism is immersed in air.
A)28° 
B)34° 
C)45° 
D)56° 
E)Total internal reflection will not occur for any value of $\alpha$.

Quizplus · Accepted Answer

The Answer of A ray of light is normally incident on face ab of a plastic prism with an index of refraction n = 1.20 as shown. 
-Determine the largest value of the angle $\alpha$ so that the ray is totally reflected at the face ac if the prism is immersed in air.
A)28° 
B)34° 
C)45° 
D)56° 
E)Total internal reflection will not occur for any value of $\alpha$.

A Ray of Light Is Normally Incident on Face Ab α\alphaα

A Ray of Light Is Normally Incident on Face Ab $\alpha$