In the figure, a point source Sof sound waves lies near a reflecting wall AB. A sound detector D intercepts sound ray R, travelingdirectly from S. It also intercepts sound ray R, that reflects from the wall such that the angle of incidence 0, is equal to the angle ofreflection 62. Assume that the reflection of sound by the wall causes a phase shift of 0.500A. If the distances in the figure are d= 2.20m, d2 = 20.9 m, and d3 = 11.9 m, what are the (a) lowest and (b) second lowest frequency at which R, and R2 are in phase at D? Take thespeed of sound to be 343 m/s.S.R2RUnits(a) NumberUnits(b) Number

Answered: Image /qna-images/answer/4d27f0dd-97d8-41ff-9c9d-876c71b85bb4.jpg

Answered: gure, a polnt source S of sound waves…

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter4: Diffraction

Section: Chapter Questions

Problem 29P: An aircraft maintenance technician walks past a tall hangar door that acts like a single slit for...

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Check Your Understanding For the experiment in Example 4.2, at what angle from the center is the third maximum and what is its intensity relative to the central maximum?
An aircraft maintenance technician walks past a tall hangar door that acts like a single slit for sound entering the hangar. Outside the door, on a line perpendicular to the opening in the door, a jet engine makes a 600-Hz sound. At what angle with the door will the technician observe the first minimum in sound intensity if the vertical opening is 0.800 m wide and the speed of sound is 340 m/s?
Check Your Understanding Going further with Example 3.4, what are the next two thicknesses of soap bubble that would lead to (a) constructive interference, and (b) destructive interference?
To save money on making military aircraft invisible to radar, an inventor decides to coat them with a nonreflective material having an index of refraction of 1.20, which is between that of air and the surface of the plane. This, he reasons, should be much cheaper than designing Stealth bombers. (a) What thickness should the coating be to inhibit the reflection of 4.00-cm wavelength radar? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
A water break at the entrance to a harbor consists of a rock barrier with a 50.0-m-wide opening. Ocean waves of 20.0-m wavelength approach the opening straight on. At what angles to the incident direction are the boats inside the harbor most protected against wave action?
Figure 3.14 shows two 7.50-cm-long glass slides illuminated by pure 589-nm wavelength light incident perpendicularly. The top slide touches the bottom slide at one end and rests on some debris at the other end, forming a wedge of air. How thick is the debris, if the dark bands are 1.00 mm apart? Figure 3.14 (a) The rainbow-color bands are produced by thin-film interference in the air between the two glass slides. (b) Schematic of the paths taken by rays in the wedge of air between the slides. (c) If the air wedge is illuminated with monochromatic light, bright and dark bands are obtained rather than repeating rainbow colors.
What is the necessary condition on the path length difference between two waves that interfere (a) constructively and (b) destructively?
A light source emits a mixture of wavelengths from 450.0 nm to 600.0 nm. When the light passes through a diffraction grating, two adjacent spectra barely overlap at an angle of 30.0. How many rulings per meter are on the grating?
If diffraction is observed for some phenomenon, it is evidence that the phenomenon is a wave. Does the reverse hold true? That Is, if diffraction is not observed, does that mean the phenomenon is not a wave?
When a wave passes from one medium to another, itsfrequenicy remaîns the same but its wavelength chanġes. Derive anexpression for the ratio of the wavelength in medium 1 to that inmedium 2 as a function of the indices of refraction of the two media(λ1/λ2=?)
Consider an E&M wave that is initially traveling in vacuum (with index of refraction nvac = 1.0). The E&M wave is incident on a vacuum glass interface, and we now consider the effect on the properties of the E&M Wave, as it enters a medium with a greater index of refraction (nglass = 1.5). Which of the statements below, about the properties of the E&M radiation, as it travels into the glass, are correct? the wavelength is constant, and the frequency decreases. the E&M wave properties are unchanged on entering the glass. the wavelength increases, and the frequency decreases. the wavelength decreases, and the frequency remains the constant
An acoustic wave strikes a boundary at medium 1 (1540 m/sec) with a 45 degrees. Upon entering medium 2 (980 m/sec) with oblique incidence, what will happen to the transmission angle?

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