Problem

In a Young's double slit experiment, the separation between the slits

= 2.0 \text{ mm}

, the wavelength of the light

= 600 \text{ nm}

and the distance of the screen from the slits

= 2.0 \text{ m}

. If the intensity at the centre of the central maximum is

0.20 \text{ W/m}^2

, what will be the intensity at a point

0.5 \text{ cm}

away from this centre along the width of the fringes? (a)

0.06 \text{ W/m}^2

(b)

0.05 \text{ W/m}^2

(c)

0.04 \text{ W/m}^2

(d)

0.03 \text{ W/m}^2