Chapter 36, Problem 73E

(a)

To determine

The expression of the amplitude of the wavelets from each infinitesimal strip, and the expression of the electric field of the wavelet at a distance $x$ from infinitesimal strip.

(b)

To determine

The expression of the wavelets from each slits at a point $P$.

(c)

To determine

The total wave detected at a point $P$.

(d)

To determine

The intensity at the point $P$.