Problem regarding refraction of light question

[silvercrow]

I have a problem in this question ... and i can't get an answer . Also please mention for which class is this question meant for if you know :) .

I tried solving it but can't apply trygnometery to the angle A for the prism .

P.S: I couldn't find the homework forum so i asked here :) .

 

[ehild]

What did you try so far? What is the relation between angle of incidence and angle of refraction?

ehild

 

[silvercrow]

Only this id given in the question . I can't even start . Only its a example of total internal reflection .

 

[ehild]

You need to know Snell's Law. http://scienceworld.wolfram.com/physics/SnellsLaw.html

ehild

 

[silvercrow]

I know snells law. Can you do the question ?

 

[ehild]

I know snells law. Can you do the question ?

It is supposed that you show what you tried so far and where you are stuck. Is there only one angle so no ray emerges from the face AC?

ehild

 

[silvercrow]

I don't know . The only data i know is in the picture