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A researcher measures the thickness of a layer of
benzene (n = 1.50) floating on water by shining
monochromatic light onto the film and varying the
wavelength of the light. She finds that light of
wavelength 579 nm is reflected most strongly from
the film.

What does she calculate for the minimum thickness of the film?
Express your answer with the appropriate units.
HA
4
t=3.6477 105
●
m
?

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