Figure shows a ray of light AO incident on a rectangular glass block PQRS, which is silvered at the surface RS. The ray is partily reflected and partly refracted.
(a) Draw the path of the reflected and refracted rays.
(b) Show at least two rays emerging from the surface PQ after reflection from the surface RS.
(c) How many images are formed in the above case ? Which image is the brightest ?

Explanation

(a)
The completed diagram is shown in figure in which OB is the reflected ray and OC is the refracted ray for the incident ray AO.
(b) Two rays emerging from the surface PQ after reflections from the surface RS are labelled as 1 and 2.
(c) Multiple (or infinite) images are formed. the second image formed due to first reflection at C at the silvered surface RS, is the brightest. it is seen in the direction of ray 1.