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Nearly monochromatic 462 nm coherent light is split into two beams. Solely due to their path...

Nearly monochromatic 462 nm coherent light is split into two beams. Solely due to their path difference, the beams are 1234 ̊ out of phase when come back together at point P. Calculate that path difference in micrometers.

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Answer #1

△X=λ.△ϕ/2π

Here, △X is path difference, △ϕ is phase difference.

so, △X = 462*10^-3*1234/2*3.14=90.78 micro meter

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