Wavelength l 600 nm Velocity of light v. Therefore the frequency of the light wave is 42 1014 Hz. A sound wave has a wavelength of 25 mm.
L is the wavelength.
Where v is the velocity of the wave. Lambda equals 2 start text m end text. And we know that any function fx vt is a wave travelling at speed v. This equation can be used to calculate wave speed when wavelength and frequency are known.