(a) Define the following terms in the context of waves:
(i) crest
(ii) trough
(iii) compression
(iv) rarefaction
(v) wavelength
(vi) amplitude
(b) Draw a neat, fully-labelled diagram of one complete transverse wave and mark on it the crest, trough, wavelength and amplitude.
(c) Draw a neat, fully-labelled diagram of one complete longitudinal wave produced along a spring and mark on it the compression, rarefaction and wavelength.