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Consider two antennas separated by 9.00 m that
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Chapter 35 Solutions
University Physics with Modern Physics, Volume 2 (Chs. 21-37); Mastering Physics with Pearson eText -- ValuePack Access Card (14th Edition)
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- Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast identical signals at the same the signals. (a) If the car is at the position of the second maximum wavelength. A car travels due north along a straight line at position x = 1.00 103 m from the center point between the antennas and its radio receives the signal. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 4.00 102 m northward, what is the wavelength of the signals? (b) How much farther must the car travel from thus position to encounter the next minimum in reception? Hint: Do not use the small-angle approximation in this problem.arrow_forwardTwo identical sources A and B emit in-phase plane radio waves with frequency 7.84E4 Hz and intensity 1.78E2 W/m2. A detector placed at location P closer to source B than source A detects a destructive interference. What is the intensity of the wave detected by the detector (in W/m2)?arrow_forwardSources A and B emit long-range radio waves of wavelength 380 m, with the phase of the emission from A ahead of that from source B by 90°. The distance rA from A to a detector is greater than the corresponding distance rB from B by 140 m. What is the magnitude of the phase difference at the detector?arrow_forward
- Consider two antennas separated by 9.00 m that radiate in phase at 120 MHz, as described in Exercise 35.1. A receiver placed 150 m from both antennas measures an intensity I0 . The receiver is moved so that it is 1.8 m closer to one antenna than to the other. (a) What is the phase difference f between the two radio waves produced by this path difference? (b) In terms of I0 , what is the intensity measured by the receiver at its new position?arrow_forwardTwo identical sources A and B emit in-phase plane radio waves with frequency 5.21E4 Hz and intensity 2.45E2 W/m2. A detector placed at location P closer to source B than source A detects a constructive interference. What is the minimum value of the path difference |AP–BP| (in m)?arrow_forwardElectromagnetic wave of unknown wavelength passes through the slit of width a =3.79 µm and the first minimum is detected at angular position 0 =6.82°. What is the wavelength of the electromagnetic wave? Provide your answer in nanometers, round it to one decimal place.arrow_forward
- A laser beam at a wavelength of 1.11 μm is coupled into an optic fiber, resulting in 138.2 mW of light inside the fiber initially. The fiber is 4.75 km long and has an absorption coefficienct of 1.562 dB/km. What light power, in mW, is at the end of the fiber?arrow_forwardA radio station has two antennas. The antennas are a distance d apart, where d equals half the broadcast wavelength. The antennas are driven in phase with each other. Let the x-axis be the line that runs through the two antennas. The angles are all measured counterclockwise from the +x-direction. (For the following, assume an observer is positioned a distance D far from the midpoint of the antennas, so that D ≫ d.) (a) In which directions is the strongest signal radiated? 0°, 180° 90°, 270° 0°, 90°, 180°, 270° 45°, 135°, 225°, 315° (b) In which directions is the weakest signal radiated? 0°, 180° 90°, 270° 0°, 90°, 180°, 270° 45°, 135°, 225°, 315°arrow_forwardTwo identical sources A and B emit in-phase plane radio waves with frequency 6.87E4 Hz and intensity 1.41E2 W/m2. A detector placed at location P closer to source B than source A detects a constructive interference. What is the intensity of the wave detected by the detector (in W/m2)?arrow_forward
- Two identical sources A and B emit in-phase plane radio waves with frequency 3.17E4 Hz and intensity 1.83E2 W/m2. A detector placed at location P closer to source B than source A detects a destructive interference. What is the minimum value of the path difference |AP–BP| (in m)?arrow_forwardA dish antenna having a diameter of 14.0 m receives (at normal incidence) a radio signal from a distant source as shown in = 0.800 µV/m. Assume the antenna the figure below. The radio signal is a continuous sinusoidal wave with amplitude E max absorbs all the radiation that falls on the dish.arrow_forwardIn the figure below, sources A and B emit long-range radio waves of wavelength 1 = 450 m, with the phase of the emission from A ahead of that from source B by 90°. The distance ra from A to detector D is greater than the corresponding distance rg by 60 m. What is the phase difference at D? 0.17 TBarrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
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