List of top Physics Questions on Refraction asked in AP POLYCET

The stars appear twinkling. The principle involved in it is

The refractive index of glass with respect to air is 2. The critical angle at their interface i

If 'a' is the thickness of the glass slab and 'b' is the vertical shift of an object through it, then refractive index of the glass slab is

When we sit at a camp fire, objects beyond the fire are seen swaying. The principle involved in it is

Which among the following materials has higher refractive index?