An object is placed in front of a slab (mu=1.5) of thickness 6 cm at a distance 28 cm from it . Other face of the slabs silvered. Find the position final image.

An object is placed in front of a slab (mu=1.5) of thickness 6 cm at a

1.	An object is placed in front of a slab (mu=1.5) of thickness 6 cm at a distance 28 cm from it . Other face of the slabs silvered. Find the position final image.
Answer» Solution :By the principleof reversibility of light, we can say if light rays are coming from the mirror and PASSING through the slab, the mirror will shift 2cm TOWARDS right for OBSERVER in fron of the slab. The position of the object from SHIFTED mirror =32 cm So, the position of the image formed by shifted mirror will be 32 cm BEHIND it. Hence, position of the image from surface 2 is 30 cm left to it and 36 cm left of surface 1.