First slide
Total internal reflection - Ray optics and optical instruments
Question

The refractive index of a material of a prism of angles 45°– 45° – 90° is 1.5. The path of the ray of light incident normally on the hypotenuse side is shown in

Moderate
Solution

According to given conditions TIR must take place at both the surfaces AB and AC. Hence only option (1) is correct.

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