In Figure sound of wavelength 0.850 m is emitted isotropically by point source S. Sound ray I extends directly to detector D, at distance L = 10.0 m. Sound ray 2 extends to D via a reflection (effectively, a "bouncing") of the sound at a flat surface. That reflection occurs on a perpendicular bisector to the SD line, at distance d from the line. Assume that the reflection shifts the sound wave by 0.500λ. For what least value of d (other than zero) do the direct sound and the reflected sound arrive at D

(a) Exactly out of phase and

(b) Exactly in phase?

Transcribed Image Text:

Ray 2 Ray 1