The figure shows some light rays reflected from a small defect in the glass toward the surface of the glass (a) If c 40 00, what is the index of refraction of the glass (b) Is there any point above the glass at which a viewer would not be able to see the defect Explain ...

Total internal reflection occurs when the angle of incidence i ...

The figure shows some light rays reflected from a small defect in the glass toward the surface

Question:

The figure shows some light rays reflected from a small defect in the glass toward the surface of the glass.
(a) If θc = 40.00°, what is the index of refraction of the glass?
(b) Is there any point above the glass at which a viewer would not be able to see the defect? Explain.