Question

The distance between a compression and the immediate next rarefaction of a longitudinal wave is:

• A. $\frac{\lambda }{4}$
• B. 2λ
• C. $\frac{\lambda }{2}$
• D. $\frac{\lambda }{8}$

Answer 1

The correct option is C

$\frac{\lambda }{2}$

Wavelength of a sound wave is defined as distance between two consecutive compressions or rarefaction. So the distance between two immediate compression and rarefaction will be $\frac{\lambda }{2}$.