Waves Ques 18
18. 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: 18.(b)
Solution:
- (b) Distance between two successive nodes $\Rightarrow \frac{\lambda}{2}=\frac{v}{2 n} \Rightarrow \frac{20}{2 n}=\frac{10}{n} \quad(.$ where $.\lambda=\frac{v}{n})$
BETA
