Waves are characterized by : Wave height -LRB- from trough to crest -RRB- , Wavelength -LRB- from crest to crest -RRB- , Period -LRB- time interval between arrival of consecutive crests at a stationary point -RRB- , The direction of wave propagation .

Waves are measured by : Height -LRB- from trough to crest -RRB- Wavelength -LRB- from crest to crest -RRB- Period -LRB- time interval between arrival of consecutive crests at a stationary point -RRB- Waves in a given area typically have a range of sizes .
