The ranking of the waves from the lowest energy wave to the highest energy wave is 1 → 4 → 2 → 3.
Explanation:
Amplitude is the highest vibrated position of a wave measured from the equilibrium position.
So the least amplitude for wave 1 is the least energy representation.
Similarly distance from midpoint to crest or trough is also the measure for the energy level of wave. Crest and trough, both are the maximum amplitude condition of the wave.
So 12 cm being the highest represents the highest energy level i.e wave 3.
