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Consider two antennas separated by 9.00 m that
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- 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 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_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_forward
- Electromagnetic 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_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_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_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_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_forwardA 0.5-MHz antenna carried by an airplane flying over the ocean surface generates a wave that approaches the water surface in the form of a normally incident plane wave with an electric- field amplitude of 3,000 (V/m). Seawater is characterized by &r=72, µr = 1, and o = 4 (S/m). The plane is trying to communicate a message to a submarine submerged at a depth d below the water surface. If the submarine's receiver requires a minimum signal amplitude of 0.01 (µV/m), what is the maximum depth d to which successful communication is still possible?arrow_forward
- Coherent electromagnetic waves with wavelength λ = 500 nm pass through two identical slits. The width of each slit is a, and the distance between the centers of the slits is d = 9.00 mm. (a) What is the smallest possible width a of the slits if the m = 3 maximum in the interference pattern is not present? (b) What is the next larger value of the slit width for which the m = 3 maximum is absent?arrow_forwardTwo radio antennas C and Rare 7.4 m apart are radiating in phase at 115 MHz. When a receiver is placed 100 m from both receivers, the intensity is lo. The receiver is then moved to point G which is 1.59 m closer to antenna C than antenna R. Find the intensity at point G in terms of lo. Round your answer to 3 decimal places.arrow_forwardTwo radio antennas are separated by 1.60 m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 10.0 m, how many maxima will you detect?arrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning