enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Shortwave radiation (optics) - Wikipedia

    en.wikipedia.org/wiki/Shortwave_radiation_(optics)

    Shortwave radiation (SW) is thermal radiation in the optical spectrum, including visible (VIS), near-ultraviolet (UV), and near-infrared (NIR) spectra. There is no standard cut-off for the near-infrared range; therefore, the shortwave radiation range is also variously defined.

  3. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.

  4. Shortwave bands - Wikipedia

    en.wikipedia.org/wiki/Shortwave_bands

    Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...

  5. Why the sky turned purple during Hurricane Milton - AOL

    www.aol.com/weather/why-sky-turned-purple-during...

    The sun emits shortwave radiation on the visible light spectrum, and in a process called Rayleigh Scattering, the shorter wavelengths -- including blues and purples on the visible light spectrum ...

  6. File:Sun-Earth Logarithmic Spectrums with Accurate Scaling ...

    en.wikipedia.org/wiki/File:Sun-Earth_Logarithmic...

    English: Figure shows spectrums of sunlight and radiation emitted by Earth's surface. Sunlight is taken as the radiation of a blackbody at 5772K but with an overall intensity scaled to match the 340 W/m 2 overall average solar irradiance above Earth's atmosphere. Emissions from Earth's surface are taken to be those of a blackbody at a ...

  7. Ultraviolet - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet

    The cleansing mechanism of UV is a photochemical process. Contaminants in the indoor environment are almost entirely organic carbon-based compounds, which break down when exposed to high-intensity UV at 240 to 280 nm. Short-wave ultraviolet radiation can destroy DNA in living microorganisms. [107]

  8. Outgoing longwave radiation - Wikipedia

    en.wikipedia.org/wiki/Outgoing_longwave_radiation

    This radiation is in the infrared portion of the spectrum, but is distinct from the shortwave (SW) near-infrared radiation found in sunlight. [1]: 2251 Outgoing longwave radiation (OLR) is the longwave radiation emitted to space from the top of Earth's atmosphere. [1]: 2241 It may also be referred to as emitted terrestrial radiation. Outgoing ...

  9. Atmospheric window - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_window

    Also, out of about 340 W/m 2 of reflected shortwave (105 W/m 2) plus outgoing longwave radiation (235 W/m 2), 80-100 W/m 2 exits to space through the infrared window depending on cloudiness. About 40 W/m 2 of this transmitted amount is emitted by the surface, while most of the remainder comes from lower regions of the atmosphere. In a ...