# Dealing with Reflections and Refractions.

A narrow monochromatic beam of light of intensity I is incident on a glass plate as shown in figure. Another identical glass plate is kept close to the first one and parallel to it. Each glass plate reflects 25% and transmits the remaining. Find the ratio of maximum and minimum intensities (i.e., $$\frac{I_{\max}}{I_{\min}}$$) in the interference pattern formed by the two beams obtained after one reflection at each plate.

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