First slide

Superposition of waves

Question

The intensity ratio of two waves is 1 : 16. The ratio of their amplitudes is

Easy

A

1 : 16
B

1 : 4
C

4 : 1
D

2 : 1

Solution

$\frac{I_{1}}{I_{2}} = {(\frac{a_{1}}{a_{2}})}^{2} = \frac{1}{16} \Rightarrow \frac{a_{1}}{a_{2}} = \frac{1}{4}$

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