Waves - Result Question 23

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

[1995]

(a) $\frac{20}{n}$

(b) $\frac{10}{n}$

(c) $\frac{5}{n}$

(d) $\frac{n}{10}$

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Answer:

Correct Answer: 23. (b)

Solution:

  1. (b) Distance between two successive nodes $\Rightarrow \frac{\lambda}{2}=\frac{v}{2 n} \Rightarrow \frac{20}{2 n}=\frac{10}{n} \quad(.$ where $.\lambda=\frac{v}{n})$