3
Question
A wave y1=A sin(kx−ωt) is superimposed on another wave whose wave equation is y2=A sin(kx−2ωt). Select the correct statement regarding the resultant waveform.
A wave y1=A sin(kx−ωt) is superimposed on another wave whose wave equation is y2=A sin(kx−2ωt). Select the correct statement regarding the resultant waveform.
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Solution
The correct option is B A wave travelling +ve x−axis
The wave y1 and y2, both are travelling wave travelling along +ve direction of x axis.
Superimposition of these two will surely form a progressive wave travelling in +ve x−axis
It cannot form a standing wave, because for formation of a standing wave, two waves of equal amplitude and frequency should travel in opposite direction.
Hence, option (B) is correct.
Why this question ?
This question gives you understanding about condition of formation of standing wave and travelling wave.
The wave y1 and y2, both are travelling wave travelling along +ve direction of x axis.
Superimposition of these two will surely form a progressive wave travelling in +ve x−axis
It cannot form a standing wave, because for formation of a standing wave, two waves of equal amplitude and frequency should travel in opposite direction.
Hence, option (B) is correct.
| Why this question ? This question gives you understanding about condition of formation of standing wave and travelling wave. |
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