- #1
McAfee
- 96
- 1
Homework Statement
When light reflects from a thin film back toward the source, what is the path length difference?
The Attempt at a Solution
A. It is equal to twice the thickness of the film.
B. It is equal to the thickness of the film.
C. It is equal to half the thickness of the film.
I have rules out C. I think the answer is A but I'm not sure.