Physics

Problem

A glass lens

(n=1.70)

is coated on one side with a transparent polymer film of refractive index

n=1.30

and thickness

120\,\text{nm}

. Light is incident normally from air. For which wavelength in air will the reflected intensity from the coated surface be minimized for the lowest-order destructive interference? a)

480\,\text{nm}

624\,\text{nm}

811\,\text{nm}

406\,\text{nm}

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