First slide

Introduction-Wave optics

Question

If the ratio of intensities of two waves is 1 : 25, then the ratio of their amplitudes will be

Easy

A

1 : 25
B

5 : 1
C

26 : 24
D

1 : 5

Solution

$\frac{I_{1}}{I_{2}} = \frac{1}{25}; ∴ \frac{a_{1}^{2}}{a_{2}^{2}} = \frac{1}{25} \Rightarrow \frac{a_{1}}{a_{2}} = \frac{1}{5}$

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