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The ship in the figure below travels along a straight line parallel to the shore and a distance d = 700 m from it. The ship's radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 810 m. The signals interfere constructively at point C, which is equidistant from A and B. The signal goes through the first minimum at point D, which is directly outward from the shore from point B. Determine the wavelength of the radio waves.
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- Prior to the switch to digital television broadcasting, and to the popularity of cable television, many homes had outdoor TV antennas. TV-reception antennas for VHF (channels 2 through 13) were constructed with cross wires supported at their centers, as shown in the figure below. The ideal length for the cross wires is one-half the wavelength to be received, with the more expensive antennas having one for each channel. Suppose you measure the lengths of the wires for channels 12 and 6 and find them to be 0.208 m and 0.958 m long, respectively. What is the frequency for channel 12?Hz What is the frequency for channel 6?HzTV-reception antennas for VHF are constructed with cross wires supported at their centers, as shown. The ideal length for the cross wires is one-half the wavelength to be received, with the more expensive antennas having one for each channel. Suppose you measure the lengths of the wires for particular channels and find them to be 1.94 and 0.753 m long, respectively. What are the frequencies for these channels?A step-index fiber of radius a = 20 μm and refractive indices ?1 = 1.47 and?2 = 1.46 operates at ?0 = 1.55 μm . Using the quasi-plane wave theory andconsidering only guided modes with azimuthal index l = 1:(a) Determine the smallest and largest propagation constants.(b) For the mode with the smallest propagation constant, determine the radii of the cylindrical shell within which the wave is confined, and the components of the wavevector k at r = 5 μm.
- Please help with this QsLight of intensity I0 passes through two sets of apparatus. One contains one slit and the other two slits. The slits have the same width. What is the ratio of the out going intensity amplitude for the central peak for the two-slit case compared to the single slit?Two 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)?