Q. The speed of a wave in a medium is $762\ m/s.$ If 3600 waves are passing through a point, in the medium in 2 minutes, then its wavelength is
A) $13.8\ m$
B) $25.3\ m$
C) $41.5\ m$
D) $57.2\ m$
Explanation
(b) Frequency of wave is
$n = \frac{3600}{2 \times 60}Hz \Rightarrow \lambda = \frac{v}{n} = \frac{760}{30} = 25.3\ m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.