What Wavelength Monochromatic Source in the Visible Region (390 to 710

question 26

Multiple Choice

What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 78.0 nm thick?

• A)467 nm
• B)386 nm
• C)456 nm
• D)404 nm
• E)499 nm

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