Question

Which wave, A or B, has lower energy? A, because it has a higher amplitude B, because it has a higher amplitude A, because it has a lower amplitude B, because it has a lower amplitude

Answer 1

Energy of wave depends on its amplitude and it is given as

$E = \frac{1}{2} kA^2$

here k = constant

A = amplitude

so energy will increase or decrease depends on the amplitude of the wave

So here if we need to check which wave has lower energy then we need to compare the amplitude.

If the amplitude is less then energy must be less

So please check in the figure that which wave out of A and B has lesser amplitude to find out the wave of lesser energy

Answer 2

Wave A will have greater energy than that of the B because wave A has a higher amplitude.

What is the amplitude of the wave?

It can be defined as the maximum displacement of the particles of the wave from the mean position.

The Energy of a wave is directly proportional to the amplitude of the wave,

$E = \dfrac 12 kA ^2$

Where,

$k$ = constant

$A$ = amplitude

So, from the equation, the wave with a higher amplitude will have higher energy.

Therefore, wave A will have greater energy than that of the B.

Learn more about amplitude:

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