These include thousands of different crystals, liquids, and gases which, when electrically charged, will emit a beam of light.
Times, Sunday Times
The heat ray emits a beam from the car's aerial, directly ahead of the vehicle.
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A stick emits a beam of energy which leaves behind a sharp scent like that of a nearby lightning strike.
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The cannon emits a beam of polaron particles, the fictional in-universe antimatter counterpart of the muon (not to be confused with the actual polaron or the actual antimuon).
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