THIN FILM INTERFERENCE






Constructive: 2t = (m + 1/2)(λ/n) in one special case!

Destructive: 2t = m (λ/n) in one special case!
Here m is any positive integer.
These equations are for the case that nfilm is greater than nair. Instead of “remembering a formula,” which will be inappropriate half the time, it is vital to work out the path and phase differences from scratch in each individual example.












THE INTERFEROMETER

LIGO, the gravitational radiation observatories.










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