In a double-slit experiment

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

In a double-slit experiment, the intensity of light at the centre of the central bright fringe is

6.2\,\mu\text{W/m}^2

. What is the intensity halfway between the centre of this fringe and the first dark band, assuming the small-angle approximation is valid? (a)

6.2\,\mu\text{W/m}^2

(b)

3.1\,\mu\text{W/m}^2

(c)

4.7\,\mu\text{W/m}^2

(d)

1.6\,\mu\text{W/m}^2