A rectangular slab of refractive index mu is placed over another slab of refractive index 3 both slabs being identical in dimensions.If a coin is placed below the lower slab for what value of mu will the coin appear to be placed at the interface between the slabs when viewed from the top

A glass slab (mu=1.5) of thickness 6 cm is placed over a paper. What is the shift in the letters?

A slab of water is on the top of a glass slab of refractive index 2. At what angle to the normal must a ray be incident on the top sureface of th eglass slab so that it is reflected from the bottom surface as shown in figure ?

A slab of refractive index mu is placed in air and light is incident at maximum angle theta_0 from vertical. Find minimum value of mu for which total internal reflection takes place at the vertical surface.

A glass slab made of a material of refractive index n_1 is kept in a medium of refractive index n_2 . A light ray is incident on the slab. Draw the path of the rays of light emerging from the glass slab, if n_1 lt n_2

A glass slab made of a material of refractive index n_1 is kept in a medium of refractive index n_2 . A light ray is incident on the slab. Draw the path of the rays of light emerging from the glass slab, if n_1 gt n_2

A postal stamp is placed on a surface and a glass cube of refractive index 3/2 is placed over it. When observed through the glass slab, the stamp appears at a height of 1 .5 cm from the bottom. Another glass cube made of different material nad having the same thickness is placed over the first glass cube. When observed from the top, the stamp now appears to be at a height of 4 cm from the bottom. Determine the refractive index of the second galss cube.

A vesserl contains a slab of glass 8cm thick and of refractive index 1.6 . Over the slab, the vessel is filled by oil of refractive index mu upto height 4.5 cm and then by another liquid, i.e., water of refractive index 4//3 and height 6cm as shown in Figure. An observer looking down from above observer that a mark at the bottom of glass slab appears to be raised up to a position 6cm from bottom of the slab. Find refractive index of oil (mu) .