Solved: A dish antenna with a diameter of 20.0 m receives

Chapter 21, Problem 21.102

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A dish antenna with a diameter of 20.0 m receives (at normal incidence) a radio signal from a distant source, as shown in Figure P21.73. The radio signal is a continuous sinusoidal wave with amplitude Emax _ 0.20 mV/m. Assume the antenna absorbs all the radiation that falls on the dish. (a) What is the amplitude of the magnetic fi eld in this wave? (b) What is the intensity of the radiation received by the antenna? (c) What is the power received by the antenna?

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