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Thread: Περί ακτινοβολίας

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  1. #8

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    Θα έλεγα ότι όπως και να έχει τελικά προκύπτει Η/Μ ακτινοιβολία κάποιου μηκους κύματος. Aπό το δίκτυο της ΔΕΗ προκύπτει Η/Μ ακτινοβολία κάποιων Hz, την Τηλεφωνία κάποιων GHz και οι ακτίνες Χ είναι κάπου λίγο πριν το <<πάνω>> μέρος του ΗΜ φάσματος

    Περί Ιονίζουσας και μη απλά :
    Non-ionizing Radiation
    Non-ionizing (or non-ionising) radiation, by contrast, refers to any type of radiation that does not carry enough energy per quantum to ionize atoms or molecules. Most especially, it refers to the lower energy forms of electromagnetic radiation (i.e., radio waves, microwaves, terahertz radiation, infrared light, and visible light). The effects of these forms of radiation on living tissue have only recently been studied. Instead of producing charged ions when passing through matter, the electromagnetic radiation has sufficient energy only for excitation, the movement of an electron to a higher energy state. Nevertheless, different biological effects are observed for different types of non-ionizing radiation
    http://en.wikipedia.org/wiki/Radiati...zing_Radiation

    Σίγουρα πάντως οι ακτίνες Χ είναι ΗΜ ακτινοβολία (το φάσμα είναι γνωστό
    http://en.wikipedia.org/wiki/File:El...c-Spectrum.png ) και μην ξανακούσω αντιρρησείς
    X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 1016 Hz to 3 1019 Hz) and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays
    http://en.wikipedia.org/wiki/X-Rays

    Έπίσης για το τρίτιο:
    Wilhelm Rntgen is credited with the discovery of X-Rays. When experimenting with a vacuum and a Crooke's tube, he noticed a phosphorescence on a nearby plate of coated glass. While working with various isotopes of hydrogen, namely tritium, he found a drastic change in photonic emissions when measuring electrical charges in a vacuum. When he took pictures of the tritium, he found that the state of one solid piece would deteriorate quickly. In one month, he discovered the main properties of X-rays that we understand to this day. Henri Becquerel found that uranium salts caused fogging of an unexposed photographic plate, and Marie Curie discovered that only certain elements gave off these rays of energy. She named this behavior radioactivity.
    http://en.wikipedia.org/wiki/Radiation#Discovery

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    Last edited by Vassilis; 10-03-2009 at 10:46 PM.

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