Q. 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) $\frac{n}{10}$
Explanation
(b) Distance between the consecutive node $= \frac{\lambda}{2},$
but $\lambda = \frac{v}{n} = \frac{20}{n}$ so $\frac{\lambda}{2} = \frac{10}{n}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.