Waves: Light and Sound
(a) Below shows the air pressure variation along a sound wave.
(i) On AB in the figure, mark one point of compression with a dot and the letter C and the next point of rarefaction with a dot and the letter R.
(ii) In terms of the wavelength, what is the distance along the wave between a compression and the next rarefaction?
(b) A sound wave travels through air at a speed of 340 m/s. Calculate the frequency of a sound wave of wavelength 1.3 m.