Question: Two light sources can be adjusted to emit monochromatic light of any visible wavelength. The two sources are coherent, 2.04m apart, and in line with

Two light sources can be adjusted to emit monochromatic light of any visible wavelength. The two sources are coherent, 2.04µm apart, and in line with an observer, so that one source is 2.04µm farther from the observer than the other.
(a) For what visible wavelengths (400 to 100nm) will the observer see the brightest light, owing to constructive interference?
(b) How would your answers to part (a) be affected if the two sources were oot in line with the observer, but were still arranged so that one source is 2.04µm farther away from the observer than the other?
(c) For what visible wavelengths will there be destructive interference at the location of the observer?

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