Sound Waves in Physics.

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A transverse wave is found to have a distance of 9 cm from a trough to a crest, a frequency of 12 Hz, and a distance of 9 cm from a crest to the nearest trough. Determine the amplitude, period, and wavelength of such a wave.

Oct 20th, 2017

The amplitude is HALF the distance from trough to crest (although saying it like that is a little confusing)...if you're talking about a transverse wave, then this distance is perpendicular to the direction the wave is traveling. 

 So the amplitude is 9/2 = 4.5cm 

In terms of information, the period is essentially the same as the frequency (in fact the period is just 1/ʋ): 

= 1/(12 Hz) = 1/12 seconds 

Wavelength = 2*9 = 18 cm

Please select my answer as the best if it was helpful to you. Thanks

Mar 12th, 2015

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