A Thin Film with an Index of Refraction of 1

question 31

Multiple Choice

A thin film with an index of refraction of 1.60 is placed in one of the beams of a Michelson interferometer.If this causes a shift of 8 bright fringes in the pattern produced by light of wavelength 580 nm, what is the thickness of the film?

• A)1.5 µm
• B)2.9 µm
• C)3.9 µm
• D)7.7 µm
• E)16 µm

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