Physics

Problem

In a Young’s double–slit experiment using monochromatic light of wavelength

\lambda

, the path difference between the two slits at a point

P

on the screen is

\Delta x

. For

P

to correspond to the

m

-th bright fringe,

\Delta x

must be a)

(m+\tfrac12)\lambda

\dfrac{m\lambda}{2}

m\lambda

(m+1)\lambda