infrared

Etymology

Definitions

1. 1

   The electromagnetic radiation of a wavelength longer than visible light, but shorter than…

   The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.

   • Collisions of these 'transparent' molecules with the molecules that do have absorption bands in the infrared can have a considerable influence on the intensities of the observed absorption bands.
2. 2

   A specific wavelength in this range.

   • Sonne has shown that by means of the luminous rays the temperature in the tissue may be raised to a higher degree than by the use of the infrareds.
   • Exposure of spectral pieces at centimeters, millimeters, and infrareds, which provide a top steadiness of the dependence "MCW radiation vs. parameter Δt" and its interannual (seasonal) dynamics.
3. 3

   A device that emits infrared radiation.

   • In his room, he could install his infrareds without being discovered.
   • Beams are the active counterparts of passive infrareds (PIRs). Since these are active infrareds, they require two parts: a transmitter and a receiver.
   • Additionally, infrareds tend to cook food faster so there's less time to render said fat.
4. ›+ 2 more definitionsshow fewer

   1. 4

      Having a wavelength in the infrared spectrum.

   2. 5

      Relating to very low energies or very large distances or time spans.

      • Unless otherwise stated, we will be working in Euclidean space compactified to a sphere in order to avoid infrared problems.
      • Secondly, as stated already by Osborne & Provenzale, pure k^(-α)-behaviour is impossible since there would have to be infinite power at zero frequency (this would correspond to an infrared catastrophe).
      • Although infrared divergences are of long-distance nature, they often play an essential role in the verification of the validity of the perturbative treatment of short-distance phenomena.

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