Question

Two points on a travelling wave having frequency $500Hz$ and velocity $300m/s$ are ${60}^o$ out of phase, then the minimum distance between the two points is

• A. $0.2$
• B. $0.1$
• C. $0.5$
• D. $0.4$

Answer 1

Answer: (B)

$0.1$

Wavelength of the wave is:

$\lambda =\frac{v}{f}=\frac{300}{500}=0.6m$

${360}^o$ phase difference corresponds to a distance of$1$ wavelength or

${360}^o$ phase difference corresponds to a distance of$0.6m$

${60}^o$ phase difference corresponds to a distance of$0.6/6=0.1m$