Totally internally reflected ray

[aurao2003]

Homework Statement

The diagram shows a cube of glass. A ray of light, incident at the centre of a face of the cube, at an
angle of incidence θ, goes on to meet another face at an angle of incidence of 50°, as shown
in Figure 3.
critical angle at the glass-air boundary = 45°
Figure 3
(a) Draw on the diagram the continuation of the path of the ray, showing it passing through the glass
and out into the air.

Homework Equations

The Attempt at a Solution

I know that thw wave will be internally reflected. But I am not sure of the angle at which it will emerge from the glass to air boundary. Please advise.

 

[ehild]

Show the picture, please.

ehild

 

[aurao2003]

Sorry. Not sure how to do it.

 

[ehild]

The solution depends on the plane of incidence. What is it?
To load a picture, go to "Go Advanced" then "Manage Attachments".

ehild