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56
Optical path length
![](/pool/data/tex/ed23f32ab6f67bf55e81ad54cbb08491.gif)
where n is the index of refraction. This is what introduces a phase difference between two waves, one in a vacuum and another in a medium with index of refraction n, when they recombine. The vacuum wave travels d, and the medium wave travels nd.
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Flashcard info:
Author: CoboCards-User
Main topic: Physics
Topic: GRE
School / Univ.: UC Santa Cruz
City: Santa Cruz, CA
Published: 20.10.2015