Light reflected from the front surface of a densest flint windowpane (n = 1890) has an intensity I1. Light entering the glass undergoes multiple reflections. Let I2 be the intensity of light reflected after only one reflection at the back surface of the glass. Find the ratio I2/I1. Assume normal incidence

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Light reflected from the front surface of a densest flint windowpane (n = 1890) has an intensity I1. Light entering the glass undergoes multiple reflections. Let I2 be the intensity of light reflected after only one reflection at the back surface of the glass. Find the ratio I2/I1.

Assume normal incidence.

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