Question

A plane progressive wave has frequency 25 Hz and amplitude $2.5\times10^{-5}m$ and initial phase zero propagates along the negative x- direction with a velocity of 300 m/s. The phase difference between the oscillations at two points 6m apart along the line of propagation is

• A. $\pi$
• B. $\frac{\pi}{2}$
• C. $2\pi$
• D. $\frac{\pi}{4}$

Answer 1

Answer: (A)

$\pi$

Answer 2

$\phi = \frac{2 \pi}{\lambda} x$