The wavelength in air (temperature of 20°C) of a sound wave of frequency 0.50 kHz is
A) 0.68 m.
B) 0.75 m.
C) 2.0 m.
D) 1.5 m.
E) 1.8 m.

Question

Quizplus · Accepted Answer

The speed of sound in air at 20°C is approximately 343 m/s. The wavelength ($\lambda$) can be found using the formula $\lambda = v/f$, where $v$ is the speed of sound and $f$ is the frequency. Substituting the given values, $\lambda = 343 m/s / 500 Hz = 0.686 m$, which rounds to 0.68 m.

The Wavelength in Air (Temperature of 20°C) of a Sound