Question

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

• A. $\frac{20}{n}$
• B. $\frac{10}{n}$
• C. $\frac{5}{n}$
• D. $\frac{n}{10}$

Answer 1

Answer: (B)

$\frac{10}{n}$

Answer 2

Distance between the consecutive node$= \frac{\lambda}{2},$ but

$\lambda = \frac{v}{n} = \frac{20}{n}$ so $\frac{\lambda}{2} = \frac{10}{n}$