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  2. Infrared - Wikipedia

    en.wikipedia.org/wiki/Infrared

    Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those of red light (the longest waves in the visible spectrum ), so IR is invisible to the human eye.

  3. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    Far-infrared, from 300 GHz to 30 THz (1 mm – 10 μm). The lower part of this range may also be called microwaves or terahertz waves. This radiation is typically absorbed by so-called rotational modes in gas-phase molecules, by molecular motions in liquids, and by phonons in solids. The water in Earth's atmosphere absorbs so strongly in this ...

  4. Electromagnetic radiation - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation

    In physics, electromagnetic radiation (EMR) is the set of waves of an electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy. [1] [2] Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields.

  5. Infrared Saunas, Explained: What Are the Benefits? - AOL

    www.aol.com/infrared-saunas-explained-benefits...

    Instead of heating the air, infrared saunas are powered by all three of the aforementioned invisible light waves (near, mid, and far infrared). Your body absorbs them and, thus, ...

  6. “Today I Learned”: 30 Interesting And Weird Facts To Satisfy ...

    www.aol.com/lifestyle/97-interesting-intriguing...

    That's why we've gathered another collection of the most interesting and weird fun facts from the TIL community on Reddit. So, sink your curious teeth into these little nuggets of information that ...

  7. Far infrared - Wikipedia

    en.wikipedia.org/wiki/Far_infrared

    Far infrared (FIR) or long wave refers to a specific range within the infrared spectrum of electromagnetic radiation. It encompasses radiation with wavelengths ranging from 15 μm (micrometers) to 1 mm, which corresponds to a frequency range of approximately 20 THz to 300 GHz. This places far infrared radiation within the CIE IR-B and IR-C ...

  8. Emissivity - Wikipedia

    en.wikipedia.org/wiki/Emissivity

    The IPCC reports an outgoing thermal radiation flux (OLR) of 239 (237–242) W m-2 and a surface thermal radiation flux (SLR) of 398 (395–400) W m-2, where the parenthesized amounts indicate the 5-95% confidence intervals as of 2015. These values indicate that the atmosphere (with clouds included) reduces Earth's overall emissivity, relative ...

  9. What to Know About the Benefits of Infrared Saunas - AOL

    www.aol.com/lifestyle/know-benefits-infrared...

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