IGCSE Physics Revision: Properties of waves, including light and sound Extended theory paper

Waves: Light and Sound

(a) Below shows the air pressure variation along a sound wave.

Waves 1

         (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.