Wave Optics

In the Young's double slit experiment, the intensity of light passing through each of the two double slits is \(2 \times 10^{-2} \mathrm{~Wm}^{-2}\). The screen-slit distance is very large in comparison with slit-slit distance. The fringe width is \(\beta\). The distance between the central maximum and a point \(P\) on the screen is \(x=\frac{\beta}{3}\). Then, the total light intensity at the point is