Question: A camera lens (n = 1.50) is coated with a thin layer of magnesium fluoride (n = 1.38). The purpose of the coating is to

A camera lens (n = 1.50) is coated with a thin layer of magnesium fluoride (n = 1.38). The purpose of the coating is to allow all the light to be transmitted by canceling out reflected light. What is the minimum thickness of the coating necessary to cancel out reflected visible light of wavelength 550 nm?

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