What is the critical angle for total internal reflection with n = 1.2?

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jsalapide
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If the transparent material has an index of refraction of 1.2, what is the angle of incidence beyond which total internal reflection occurs?
 

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I solved for the critical angle and I got 56.44 degrees,

Should the answer be "greater than 56.44 degrees" so that the total internal reflection may occur?
 


EDIT: this is in response to post #1.

You'll have to show some work on the problem before receiving help.

Snell's Law is helpful here. You could also review your textbook or lecture notes discussion of total internal reflection.
 
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jsalapide said:
I solved for the critical angle and I got 56.44 degrees,
Correct :smile:

Should the answer be "greater than 56.44 degrees" so that the total internal reflection may occur?

Since they are asking for the angle beyond which total internal reflection occurs, the answer is simply 56 degrees.