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

Chapter3: Interference

Section: Chapter Questions

Problem 12CQ: An inventor notices that a soap bubble is dark at its thinnest and realizes that destructive...

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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?
If you have completely polarized light of intensity 150 W/m2 , what will its intensity be after passing through a polarizing filter with its axis at an 89.0 angle to the light’s polarization direction?
Components of some computers communicate with each other through optical fibers having an index of refraction n = 1.55. What time in nanoseconds is required for a signal to travel 0.200 m through such a fiber?
Radio telescopes are telescopes used for the detection of radio emission from space. Because radio waves have much longer wavelengths than visible light, the diameter of a radio telescope must be very large to provide good resolution. For example, the radio telescope in Penticton, BC in Canada, has a diameter of 26 m and can be operated at frequencies as high as 6.6 GHz. (a) What is the wavelength corresponding to this frequency? (b) What is the angular separation of two radio sources that can be resolved by this telescope? (c) Compare the telescope’s resolution with the angular size of the moon.
What is the wavelength of light falling on double slits separated by 2.00 m if the third-order maximum is at an angle of 60.0° ?
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?
The angle been the axes of two polarizing filters is 45.00. By how much does the second filter reduce the intensity of the light coming through the first?
Referring to the electric room heater considered in problem 5, calculate the intensity of IR radiation in W/m2 projected by the concave mirror on a person 3.00 m away. Assume that the heating element radiates 1500 W and has an area of 100 cm2 , and that half of the radiated power is reflected and focused by the mirror.
The movable mirror of a Michelson interferometer is attached to one end of a thin metal rod of length 23.3 mm. The other end of the rod is anchored so it does not move. As the temperature of the rod changes from 15°C to 25 C , a change of 14 fringes is observed. The light source is a He Ne laser, =632.8 nm . What is the change in length of the metal bar, and what is its thermal expansion coefficient?
At the end of Example 17, it was stated that the intensity of polarized light is reduced to 90.0% of its original value by passing through a polarizing filter with its axis at an angle of 18.4° to the direction of polarization. Verify this statement.
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 Brewster’s angle for light traveling in water that is reflected from crown glass?

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