Which one of the following expresses the fringe width in Young’s double-slit…

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Which one of the following expresses the fringe width

\beta

in Young’s double-slit experiment in terms of wavelength

\lambda

, slit separation

d

, and distance to the screen

D

? (a)

\beta = \dfrac{dD}{\lambda}

(b)

\beta = \dfrac{2\lambda D}{d}

(c)

\beta = \dfrac{\lambda D}{d}

(d)

\beta = \dfrac{\lambda d}{D}