Question

A sine wave is travelling in a medium. A particular particle has zero displacement at a certain instant. the particle closest to it having zero displacement is at a distance

• A. $\lambda /4$
• B. $\lambda /3$
• C. $\lambda /2$
• D. $\lambda$

Answer 1

Answer: (C)

$\lambda /2$

The minima of the sine wave function occurs at 0 and after this, the next minima of the sine wave occurs at $\pi$. The wavelength of the sine wave function is $2\pi$ i.e. one wave completes its full waveform in period of $2\pi$.

then the particle closest to it having zero displacement is at a distance $\pi$ and is equal to $\lambda /2$