Concept related to Apparant depth & Glass slab

Apparent Depth

Real and Apparent Depth

A glass slab is made such that the refractive index of the material increases with its depth. The glass slab is kept in air and a light ray is incident on its top face. How will the light ray pass through it ?

If glass slab is replaced by a hollow slab filled with water, will the net deviation change? For given angle of incidence, will the deviation of the ray in first refraction increase 3s or decreases compared to the one in glass slab?

If a ray passes from air to glass in a spherical glass slab and passes through the centre of the slab without deviation, then the angle of incidence from air to glass at the point on the glass slab is.

What is the focal length of a glass slab ?

Circle OF Illumination||Apparent Depth

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