In a double-slit experiment the fringe width is

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

Problem

β = 0.30\,\text{mm}

. Count the number of complete bright fringes that lie entirely between

y = 1.1\,\text{mm}

and

y = 4.7\,\text{mm}

on the same side of the central maximum. (a) 14 (b) 11 (c) 12 (d) 13