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a) A coating is applied to the lenses of eyeglasses to minimize back-glare. The reflective index...

a) A coating is applied to the lenses of eyeglasses to minimize back-glare. The reflective index for the coating is 1.56 and for the lens material is 1.47, and using light with a wavelength of 550nm, find the thinnest, non-zero, coating that will minimize the reflection.  b) Explain with the aid of a diagram how back-glare can be reduced in eyeglasses by using an anti-reflective coating.

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