Q. A wave of wavelength $2m$ is reflected from a surface. If a node is formed at $3m$ from the surface, then at what distance from the surface another node will be formed
A) $1m$
B) $2m$
C) $3m$
D) $4m$
Explanation
(d) Distance between two consecutive nodes is $\frac{\lambda}{2}$
$\therefore\frac{\lambda}{2} = \frac{2m}{2} = 1m$
So the distance of another node from the surface will be
$3 + \frac{\lambda}{2} = 3 + 1 = 4m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.