First slide

Superposition of waves

Question

If two waves having amplitudes 2A and A and same frequency and velocity, propagate in the same direction in the same phase, the resulting amplitude will be

Easy

A

3A
B

$\sqrt{5} A$
C

$\sqrt{2} A$
D

A

Solution

In the same phase $ϕ = 0$ so resultant amplitude = $a_{1} + a_{2} = 2 A + A = 3 A$

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