Physics

Problem

A ray of light of intensity

I

is incident on a parallel glass slab at point

A

as shown in diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays

AB

and

A'B'

undergo interference. The ratio of

I_{\max}

and

I_{\min}

is [JEE(Main) 2013, Online] ![Diagram showing a ray of light incident on a parallel glass slab. The ray undergoes partial reflection and refraction at the first surface (point A). The reflected ray is AB. The refracted ray enters the slab, reflects at the second surface (point A'), and exits the slab as ray A'B'. The rays AB and A'B' interfere.](https://storage.googleapis.com/diraq-contents/homework-question-parsing/marker/20260106T182719Z/fa490dcf6b68410eb150dc1de156af14/935eed7aa61f7777f62cfc032e11bee9_img.jpg) (1) 4 : 1 (2) 8 : 1 (3) 7 : 1 (4) 49 : 1

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