The amplitude of two interfering waves are $a$ and $2 a$ respectively. The resultant amplitude in constructive interference will be

5 a

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a

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3 a

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2 a

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Solution

The correct option is C $3 a$
In constructive interference the two waves are in phase and they simply add up. Thus resultant amplitude is $2 a + a = 3 a$

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The amplitude of two interfering waves are a and 2a respectively. The resultant amplitude in constructive interference will be

The correct option is C 3aIn constructive interference the two waves are in phase and they simply add up. Thus resultant amplitude is 2a+a=3a

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The correct option is C $3 a$
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