infrared :

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  • n  the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
    they could sense radiation in the infrared
  • n  electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
  • s  having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
    infrared radiation
    infrared photography

  • The B-2 is hard to detect via infrared, acoustic, electromagnetic, visual or radar signals.
  • The necklace sends image files via infrared.
  • In recent years attempts have been made to use infrared radiation (invisible vibration longer in wave length than visible light) to help fog-wrapped ships at sea.
News & Articles


  • Charles Townes in Science Daily (press release)
    Using near-infrared light for the induction of hyperthermia is particularly attractive because living tissues do not strongly absorb radiation in this range. Once the carbon nanotubes have bound to the tumor cells, an external source of... Ellen Vitetta (blog) Jun 17, 2008 51724 69161 infrared We observe around 11 microns, the mid-infrared, where this long wavelength penetrates the dust and the narrow bandwidth avoids any spectral lines, and so we see the star relatively undistorted," said Townes. "We have also had the good...
  • M Annadurai in Economic Times
    Chandrayaan-1 aims to achieve these objectives through high resolution of the moon in the visible, near infrared, microwave and x-ray regions of the electromagnetic spectrum,mission director M. Annadurai told IANS.

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