Question

In a Young's double slit experiment, the separation between the slits = 2.0 mm, the wavelength of the light = 600 nm and the distance of the screen from the slits = 2.0 m. If the intensity at the centre of the central maximum is 0.20 W/m², what will be the intensity at a point 0.5 cm away from this centre along the width of the fringes ?

Answer 1

Given that, d = 2 mm = 2x10^–3 m, λ= 600 nm = 6 x10^–7 m, I_max = 0.20 W/m², D = 2m

For the point, y = 0.5 cm