## Answers

Ans.) seit width = b = 0.05mm = 0.05 x 10²m seit separation d = 0.25mm = 0.25% 10²m A = 633nm = 6338 109 m Distance of the screen from the seit =D DE 65cm 0.65m now first diffraction minima occurs when b sino = d Since o = 633x1059 0.05X163 sino =0.01266 De width of the central diffra- inteifeience maxima ocecs at etion maximum dsino = må m20,1,2,3 d since This gives the number of interference maxima up to ² m A

angie m. 0.25 X103 X0.0126.6 633 X 109 m 55. the interference maxima coresponding to m2 5 will be missing as for since 20.01266 fisst diffraction minima očeurs So the number of interference maxima up to angle o - the number of interference maxima visible in the centsat diffraction maximum = 9 one Control maxima included 4

also from the figure above we see that D' 2D tance for small co tance ~ since co is small follows from o) → D'=aD since 72x0.65 X 0.017266 0.016458 m 1.6458 cm So the graph of intensity ressus position looks like.

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Intensity

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