8.Two layers of transparent glass with different indices of refraction are stacked on topof each other, one layer has index of refraction n, =1.400 and path length L, =15.0µmwhile the other has index of refraction n, =1.600 and path length L, = 24.0µm . Eachlayer is illuminated with a ray of light of air wavelength 1 =480.0 nm and the two parallelrays are initially in phase. After passing through the glass and air the two light rays arerecombined at a point far away without further phase shifts and there is interference.What multiple of 1 gives the phase difference between the two paths after bothrays have emerged from the layers and have been recombined far away from thelayers?b.а.Is the interference totally constructive or totally destructive or partiallyconstructive or partially destructive?

Given that: n1=1.400L1=15.0 μmn2=1.600L2=24.0 μmλ=480.0 nm

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