A thin layer of colorless oil is spread over water in a container ( = – McqOptions

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1.	A thin layer of colorless oil is spread over water in a container ( = 1.4). If the light of wavelength 640 nm is absent in the reflected light, what is the minimum thickness of oil layer?
A.	179.6 nm
B.	198.3 nm
C.	207.6 nm
D.	214.3 nm
Answer» E.

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