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Frequency

When two wave...

Question

When two waves of almost equal frequencies $n_{1}$ and $n_{2}$ reach at a point simultaneously, what is the time interval between successive maxima?

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Solution

When two waves of almost equal frequencies $n_{1}$ and $n_{2}$ reach at point simultaneously, then beat frequency is

$(n_{1} - n_{2})$ .

Time period of beats $= \frac{1}{n_{1} - n_{2}} s$

So, the time interval between successive maxima is $\frac{1}{n_{1} - n_{2}} s$

Final Answer: $= \frac{1}{n_{1} - n_{2}} s$

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