79 O In Fig. 17-46, sound of wavelength 0.850 m is emitted isotropically by point source S. Sound ray 1 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 0.500A. For what least value of d (other than zero) do the direct sound and the reflected soupd arrive at D (a) exactly out of phase and (b) exactly in phase? Ray 2 Ray 1 L. 2 Figure 17-46 Problem 79.

79 O In Fig. 17-46, sound of wavelength 0.850 m is emitted isotropically by point source S. Sound ray 1 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 0.500A. For what least value of d (other than zero) do the direct sound and the reflected soupd arrive at D (a) exactly out of phase and (b) exactly in phase? Ray 2 Ray 1 L. 2 Figure 17-46 Problem 79.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

79 O In Fig. 17-46, sound of wavelength 0.850 m is emitted
isotropically by point source S. Sound ray 1 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 0.500A. For what least value of d (other than zero)
do the direct sound and the reflected soupd arrive at D (a) exactly
out of phase and (b) exactly in phase?
Ray 2
Ray 1
L.
2
Figure 17-46 Problem 79.

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