Two shortwave radio antennas broadcast identical, in-phase signalsat the same fr

Question

Two shortwave radio antennas broadcast identical, in-phase signalsat the same frequency. The transmitters are 176.0 m north, and176.0 m south of Western Ave, respectively, as shown (that is,they are separated by 352.0 m). Western Ave is 452.0 mlong. Starting at the end of that avenue, a car drives north alongNegundo Street, which lies parallel to the line joining the tworadio antennas. The car first encounters a minimum in receptionafter it travels 124.0 m. What is the wavelength of the radiowaves? Assume that the car and the transmitters are all at the samealtitude

Explanation / Answer

the condition for bright fringes,or constructiveinterference,at point P is d * sinbright = m * (m =0,±1,±2,..............) or = (d * sinbright/m) d = 352.0 m,sinbright = (124.0/452.0) and m =1 or = (352.0 * (124.0/452.0)/1) = 96.5 m the wavelength of the radio waves is = 96.5 m

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