In the figure, a sound of wavelength 0.750 m is emitted isotropically by point source S. Sound ray 1 extends directly to detector D, at distance L = 9.00 m. Sound ray 2 extends to D via a reflection (effectively a "bouncing") of the sound at a flat surface. The 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 sound arrive at D (a) exactly out of phase and (b) exactly in phase?

In the figure, a sound of wavelength 0.750 m is emitted isotropically by point source S. Sound ray 1 extends directly to detector D, at distance L = 9.00 m. Sound ray 2 extends to D via a reflection (effectively a "bouncing") of the sound at a flat surface. The 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 sound arrive at D (a) exactly out of phase and (b) exactly in phase?

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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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

Current Attempt in Progress
In the figure, a sound of wavelength 0.750 m is emitted isotropically by point source S. Sound ray 1 extends directly to detector D, at
distance L = 9.00 m. Sound ray 2 extends to D via a reflection (effectively a "bouncing") of the sound at a flat surface. The 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 sound arrive at D (a) exactly out of phase and
(b) exactly in phase?
(a) Number
(b) Number
and
Ray 2
Unit
Unit
Ray 1
L
L
V

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