Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 56

A transparent dielectric coating is applied to glass ( r = 4, r = 1) to eliminate the reflection of red light [ 0 = 0.75 ( m)].
a) Determine the required dielectric constant and thickness of the coating.
b) If violet light [ 0 = 0.42 (( m)] is shone normally on the coated glass, what percent­age of the incident power will be reflected