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infrared ray |
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To create the permanent tags, a laser bombards the produce with infrared rays, says the inventor, Greg Drouillard. When exposed to infrared rays, the quantum dots absorbed the light and gave up electrons, generating a current. Gamma rays are the most energetic of all forms of electromagnetic radiation, but as an object emitting them cools, it radiates waves of lower energy: X-rays, ultraviolet radiation, visible light, infrared rays and, at the lowest range of the energy spectrum, radio. |
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infrared ray - a ray of infrared radiation; produces a thermal effect (as from an infrared lamp)
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infrared ray
