Question

Three waves are moving right with the

same frequency, wavelength, and amplitude.

The second wave has a phase angle

Φ

relative to the first wave. The third wave has

a phase angle of 2

Φ

relative to the first wave. What is the value of

Φ

that makes the

resultant amplitude of the

three waves equal to 2.2

times the amplitude of the

original waves? Start by combining the fi

rst and third wave, then using that resultant

in combination with the second wave.

Answer 1