A film of oil (nf = 1.42) 0.00021 mm thick is spread on a glass plate and viewed from above at nearly 90\deg to the surface. What color will the film appear to be? Compute the vacuum wavelength.
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![A film of oil (nf = 1.42) 0.00021 mm thick is spread on
a glass plate and viewed from above at nearly 90\deg
to the surface. What color will the film appear to be?
Compute the vacuum wavelength.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F966b0957-88cd-4274-a3a9-db6724673dfd%2F88ee58bd-ce5d-4db0-a716-f24aa7702042%2Fefu119_processed.jpeg&w=3840&q=75)
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