Problem — Wavelength at 440 Hz

Problem

A string vibrates producing waves with frequency $440\;\text{Hz}$ in air at room temperature. The speed of sound in air is $340\;\text{m/s}$. Calculate the wavelength in air.

Solution

Fundamental relation. $v = \lambda f$, hence:

$\lambda = \frac{v}{f} = \frac{340}{440} \approx \ev{0{,}77\;\mathrm{m}}$

This is the reference “A” ($440$ Hz) of the tuning fork.

Linked atoms

Argomenti: Waves Concetti: Period and frequency