What's the meaning of the Non-ionizing radiation sign »

Non-ionizing radiation sign

This page is about the meaning, origin and characteristic of the symbol, emblem, seal, sign, logo or flag: Non-ionizing radiation sign.

Rate this symbol:3.0 / 3 votes

Non-ionizing radiation sign

Non-ionizing (or non-ionising) radiation refers to any type of electromagnetic radiation that does not carry enough energy per quantum to ionize atoms or molecules—that is, to completely remove an electron from an atom or molecule. 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. The region at which radiation becomes considered as "ionizing" is not well defined, since different molecules and atoms ionize at different energies. The usual definitions have suggested that radiation with particle or photon energies less than 10 electronvolts (eV) be considered non-ionizing. Another suggested threshold is 33 electronvolts, which is the energy needed to ionize water molecules. The light from the Sun that reaches the earth is largely composed of non-ionizing radiation, since the ionizing far-ultraviolet rays have been filtered out by the gases in the atmosphere, particularly oxygen. The remaining ultraviolet radiation from the Sun is in the non-ionizing band, and causes molecular damage (for example, sunburn) by photochemical and free-radical-producing means that do not ionize.

1,007 Views

Graphical characteristics:
Symmetric, Closed shape, Colorful, Contains both straight and curved lines, Has no crossing lines.

Category: Hazard Symbols.

More symbols in Hazard Symbols:

Hazard symbol are recognizable symbols designed to warn about hazardous materials, locations, or objects, including electric currents, poisons, and other things. The use of hazard symbols is often re… read more »

Have a discussion about Non-ionizing radiation sign with the community:

0 Comments

    Citation

    Use the citation below to add this symbol to your bibliography:

    Style:MLAChicagoAPA

    "Non-ionizing radiation sign." Symbols.com. STANDS4 LLC, 2024. Web. 28 Mar. 2024. <https://www.symbols.com/symbol/non-ionizing-radiation-sign>.

    We need you!

    Are we missing an important symbol in this category?

    Graphical Index

    Use our unique search feature to find a symbol based on its various graphical characteristics:


    • Symmetry:
    • Shape:
    • Colors:
    • Curveness:
    • Crossing:

    Quiz

    Are you a world flags master?

    »
    A Cameroon
    B Ukraine
    C Nicaragua
    D Bahrain

    Browse Symbols.com