Question

A ray oflight of intensity l is incident on a parallel
glass slab at a point A as shown. It undergoes partial
reflection and refraction. At each reflection, 25% of
incident energy is reflected. If the rays AB and A'B"
undergo interference, then the ratio f their
intensities is
(2) 16 : 9
(4) 49 1
(1) 4: 3
(@) 7: 1

Answer 1

hello friend
the answer like to be option 3
it is right or not..
hope it helps u