Question

A traveling wave passes a point of observation. At this point, the time interval between successive crests is 0.2 seconds and

• A. The wavelength is 5 m
• B. The frequency is 5 Hz
• C. The velocity of propagation is 5 m/s
• D. The wavelength is 0.2 m

Answer 1

The correct option is B The frequency is 5 Hz

The frequency is $5Hz$

Phase difference,

$\Delta \varphi =\frac{2\pi }{T}\left(\Delta t\right)$

$2\pi =\frac{2\pi }{T}\left(0.2\right)$

$\Rightarrow \frac{1}{T}=5se{c}^{-1}$

$n=5Hz$