Answer to Question #173711 in Electricity and Magnetism for Sree

Question

In diffraction experiment, if the distance between slit and screen Equals Ten thousand times the distance between central fringe to first fringe. Then find the wavelength of laser wave that diffracted on slit with width 6 mm.

Answer 1

Answer

Given

if the distance between slit and screen Equals Ten thousand times the distance between central fringe to first fringe

D=10000$x$

d=6mm

So wavelegth is given

$\lambda=\frac {xd}{mD}=\frac {6mm}{1\times100000}$ =60$\mu m$