In a Young’s double-slit set-up the fringe width on a screen is

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

Problem

β = 0.25\,\text{mm}

. How many complete bright fringes (including the central maximum) lie between

y = -3\,\text{mm}

and

y = +3\,\text{mm}

on the screen? (a)

24

(b)

13

(c)

25

(d)

49