White light may be considered to be a mixture of waves with λ λ ranging between 3900 Å and 7800 Å. An oil film of thickness 10,000 Å is examined normally by reflected light. If μ μ = 1.4, then the film appears bright for
Text Solution
Verified by ExpertsThe correct answer is:
A
The film appears bright when the path difference
is equal to odd multiple of 
i.e. 
where 
The wavelength which are not within specified range are to be refracted.
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