The two prisms shown in the diagram below are made of glass. A ray of red light enters each prism from the air, as shown. The critical angle for red light at the glass-air boundary is 42°.
On the diagram, complete the paths of the rays passing through each prism and out into the air again.

The two prisms shown in the diagram below are made of glass A ray of red light enters each prism from the air as shown The critical angle for red light at the g class=


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