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A ray of light incident on the horizonta...

A ray of light incident on the horizontal surface of a glass slab at `70^@` just grazes the adjacent vertical surface after refraction. Complete the critical angle and refractive index of glass.

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To solve the problem, we need to find the critical angle and the refractive index of the glass slab given that a ray of light is incident at an angle of \(70^\circ\) and just grazes the adjacent vertical surface after refraction. ### Step-by-Step Solution: 1. **Understanding the Setup**: - We have a glass slab with a horizontal surface. A ray of light strikes this surface at an angle of \(70^\circ\) with respect to the normal. - After refraction, the ray travels through the glass and just grazes the adjacent vertical surface, indicating that it is at the critical angle when it reaches the vertical surface. ...
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