First slide

Travelling wave

Question

If separation between screen and source is increased by 2% what would be the effect on the intensity

Easy

A

Increases by 4%
B

Increases by 2%
C

Decreases by 2%
D

Decreases by 4%

Solution

$I \propto \frac{1}{r^{2}} \Rightarrow \frac{ΔI}{I} = - 2 \frac{Δr}{r} = - 2 \times 2 = - 4 %$
Hence intensity is decreased by 4%.

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