Question

The time lag between two particles vibrating in a progressive wave separated by a distance $20$ m is $0.02s$ . The wave velocity if the frequency of the wave is $500Hz$ , is

• A. $1000m{s}^{-1}$
• B. $500m{s}^{-1}$
• C. $2000m{s}^{-1}$
• D. $250m{s}^{-1}$

Answer 1

Answer: (A)

$1000m{s}^{-1}$

Given,

distance, $s=20m$

$t=0.02s$

$f=500Hz$

Velocity, $v=\frac{s}{t}$

$v=\frac{20}{0.02}=1000m/s$

The correct option is A.