Monochromatic light, at normal incidence, strikes a thin film in air. If (lambda) denotes the wavelength in the film, what is the thinnest film in which he reflected light will be a maximum?
2d = (m+1/2)(lambda/nfilm) for minimal reflection and
2d = m(lambda/nfilm) for max reflection
The Attempt at a Solution
I used the second formula above:
2d = m(lambda/n) and solved for d;
I got d = lambda/2n , but someone else in my class says it is lamba/4n,
Can anyone offer any insight? Thanks!!