Lenses in fine quality cameras are coated to reduce the reflection from the lenses
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
30. Lenses in fine quality cameras are coated to reduce the reflection from the lenses. If the coating material has an index of refraction between that of air and glass, what thickness of coating will produce the least reflection?
(A) one-quarter of the wavelength in the coating
(B) one-third of the wavelength in the coating
(C) one-half of the wavelength in the coating
(D) one wavelength in the coating