Question

In the experiment on diffraction due to a single slit, show that (i) the intensity of diffraction fringes decreases as the order

Answer 1

Answer:

(i) In diffraction due to a single slit the path difference is given by: Let us divide the slit into three equal parts. If we take first two parts of slit, the path difference between rays diffracted from the extreme ends of first two parts Then the first two parts will have a path difference of λ/2 and cancel the effect of each other. The remaining third part will contribute to the intensity at a point between two minima.