Wave D has an amplitude of 2 cm, and wave E has an amplitude of 2 cm. The waves are out of phase. Determine the amplitude of resulting wave F

Amplitude of F = 0 cm

Explanation:

We know that both waves have same amplitude. Note that when two waves are out of phase, algebraic sum of two waves is calculated.

So,

Amplitude of F = Amplitude of D + Amplitude of E

Supposing amplitude of D is upwards in direction and amplitude of E is downwards in direction.

Amplitude of F = 2 + (-2)

Amplitude of F = 0 cm