Question

There are two sets of apparatus of YDSE. In set A phase difference between two waves emanating from slits not change with time, whereas in set B phase difference between two waves from slits change rapidly with time. what difference will be observed in pattern obtained in screen in two set ups. Guys Plss solve it.. ​

Answer 1

Explanation:

(a) Set A: stable interference pattern, the positions of maxima and minima does not change with time.

Set B: positions of maxima and minima will change rapidly with time and an average uniform intensity distribution will be observed on the screen.

(b) Expression for intensity of stable interference pattern in set –A

If the displacement produced by slit S1 is

The amplitude of the resultant displacement is 2a cos (ϕ/2) and therefore the intensity at that point will be

I = 4I0 cos2(ϕ/2)

Ф = 0

∴ I = 4 I0

In set B, the intensity will be given by the average intensity

Answer 2

Answer:

Refer to the above attachment to know the answer plz.

Hope it helps.

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