College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 8

Nonreflective coatings on camera lenses reduce the loss of light at the surfaces of multilens systems and prevent internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride ( n = 1.38) on flint glass ( n = 1.66) that will cause destructive interference of reflected light of wavelength 550 nm near the middle of the visible spectrum.