First slide

Intensity of electromagnetic wave

Question

Ratio of intensities of two waves are given by 4 : 1' Then the ratio of the amplitudes of the two waves is

Easy

A

2:1
B

1:2
C

4:1
D

1:4

Solution

$\frac{I_{1}}{I_{2}} = \frac{4}{1} or \frac{{a_{1}}^{2}}{{a_{2}}^{2}} = \frac{4}{1} or \frac{a_{1}}{a_{2}} = \frac{2}{1}$

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