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piglet
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Homework Statement
Monochromatic light of variable wavelength is incident normally on a thin sheet of plastic film in air. The reflected light is a maximum only for 482.9 and 676.0 in the visible spectrum. What is the minimum thickness of the film ?
Homework Equations
2nt=m*lambda 2nt=(m+1/2)*lambda
The Attempt at a Solution
Ive attemped using both wave lengths in the equation doesn't work.
Answer is 525nm.