First slide

Standing waves

Question

Two waves approaching each other with a velocity of 20 m/s and frequency n. the distance between two consecutive nodes is

Easy

Solution

The distance between the consecutive nodes is $\frac{λ}{2}$ , but
$λ = \frac{v}{n} = \frac{20}{n} \Rightarrow \frac{λ}{2} = \frac{10}{n}$

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