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A thin film of thickness 1.5 μm is placed in Michelson interferometer which causes a 7.5 fringe shift in the interference pattern. The film is removed and replaced with another made of the same material which causes a shift of 9.0 fringes. Both shifts are relative to the pattern when no film was inserted. What is the thickness (μm) of the second film? 2.0 2.7 1.1 0.6 1.3 1.5 2.2 2.5 1.8 0.8

A thin film of thickness 1.5 μm is placed in Michelson interferometer which causes a 7.5 fringe shift in the interference pattern. The film is removed and replaced with another made of the same material which causes a shift of 9.0 fringes. Both shifts are relative to the pattern when no film was inserted. What is the thickness (μm) of the second film? 2.0 2.7 1.1 0.6 1.3 1.5 2.2 2.5 1.8 0.8

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A thin film of thickness 1.5 μm is placed in Michelson interferometer which causes a 7.5 fringe shift in the interference pattern. The film is removed and replaced with another made of the same material which causes a shift of 9.0 fringes. Both shifts are relative to the pattern when no film was inserted. What is the thickness (μm) of the second film? 2.0 2.7 1.1 0.6 1.3 1.5 2.2 2.5 1.8 0.8

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