First slide

Young's double slit Experiment

Question

The intensity ratio of two coherent sources of light is p. They are interfering in some region and produce interference pattern. Then the fringe visibility is

Moderate

A

$\frac{1 + p}{2 \sqrt{p}}$
B

$\frac{2 \sqrt{p}}{1 + p}$
C

$\frac{p}{1 + p}$
D

$\frac{2 p}{1 + p}$

Solution

Visibility $V = \frac{I_{max} - I_{min}}{I_{max} + I_{min}} = \frac{2 \sqrt{I_{1} I_{2}}}{(I_{1} + I_{2})}$
$= \frac{2 \sqrt{I_{1} / I_{2}}}{(\frac{I_{1}}{I_{2}} + 1)} = \frac{2 \sqrt{P}}{(P + 1)}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App