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What is the angle of the source above the horizon

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Astronomers observe a 60.0 * 10^6 Hz source both directly and by reflection from the sea. The receiving dish is 20.0m above the sea level. If the two waves interfere constructively at the location of the dish, what is the angle of the source above the horizon? Discover the smallest nonzero angle.  

Reference no: EM13672614

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