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 77 nm thick?
A)409 nm
B)430 nm
C)450 nm
D)558 nm

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The Answer of 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 77 nm thick?
A)409 nm
B)430 nm
C)450 nm
D)558 nm

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