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Not getting answer correct on Isaac Physics :(

Light is passing from crown glass into Air. The angle of incidence is 50 degrees.

Refractive index of crown glass= 1.51; refractive index of air= 1

Really confused what to do : / Please help!
Might help if you posted a link to the question?
So this is what I have done so far,

1.51sin(50) = sin(x)... but every time I try to solve it using a calculator, I am getting an error message. Also I checked what the critical angle was and it is 41.5 degrees.
What's the question?
I'm going to assume what's the Critical angle?

Sin C = 1/n
Solve for C which would be sin^-1(1/1.51)

C= 41.5 degrees
Oops I forgot to put in the question. It is asking me to find the angle of refraction. Sorry!
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Avatar for akaash13
akaash13
6
I think I remember this question - I think there was total internal reflection and in the question they said that if TIR occurs put 99 and no units as your answer or something like that. Reread the question and see.

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