The effects are produced at a given point in space by two wave decribed by the equations `y_(1) = y_(m) sin thetat` and `y_(2) = y_(m) sin (omegat + phi)` where `y_(m)` is the same for both the waves and `phi` is a phase angle. Tick the incorrect statement among the following.

Options

A. The maximum intensity that can be achieved at a point is twice the intensity of either wave and occurs if `phi = 0`
B. The maximum intensity that can be achieved at a point is four times the intensity of either wave and occurs if `phi = 0`
C. The maximum intensity that can be achieved at a point its twice the amplitude either wave and occurs at `phi = 0`
D. When the intensity is zero, the net amplitude is zero, and at this point `phi = pi`

Answer

A