Sound Waves - Wavelength and Amplitude

Question	Answer
The wavelength of a wave is the distance over which the wave's shape repeats itself	It is represented by the symbol λ
An example of this is shown with the sine wave	Image: Wavelength (image/png)
The top of the wave is called the crest and the bottom is called the trough	The wavelength can be measured from crest to crest or from trough to trough
The SI unit of wavelength is the meter.	This is same for all types of waves
We can find the wavelength of a sound wave from the equation λ =\(\frac{v}{f}\)	Where λ is the wavelength, v is the speed of sound and f is the frequency
The amplitude of a wave is the change over a period	Peak-to-peak amplitude is measured from the trough to the crest of the wave
The amplitude effects the loudness of the tone of the sound	The bigger the amplitude, the louder the sound
The amplitude is not always constant with sound waves	It can vary with time / position

Resource summary

	Created by leonie.examtime over 10 years ago

	Copied by ed.wilson89 over 10 years ago