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Submission + - Microwave pain ray keeps frost from killing crops

An anonymous reader writes: Philip K. Dick's novella Project Plowshare was set in a world where seemingly deadly new weapons are "plowshared" into consumer products. A few years after that book was set defense giant Raytheon is turning their raygun-esque Active Denial System from a weapon into an agricultural tool to prevent frost from damaging citrus and grape crops/.
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Microwave pain ray keeps frost from killing crops

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"Consider a spherical bear, in simple harmonic motion..." -- Professor in the UCB physics department