Radiation
good stuff
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[[File:Alfa beta gamma radiation penetration.svg|upright=1.5|thumb|right|An illustration of the relative abilities of three different types of [[ionizing radiation]] to penetrate solid matter. Typical alpha particles (α) are stopped by a sheet of paper, while beta particles (β) are stopped by 3mm aluminum foil. Gamma radiation (γ) is dampened when it penetrates lead. Note caveats in the text about this simplified diagram.{{clarify|date=March 2020|reason=The text does not mention the diagram. The caveats should probably be listed in a note using Template:Efn}}]] |
[[File:Alfa beta gamma radiation penetration.svg|upright=1.5|thumb|right|An illustration of the relative abilities of three different types of [[ionizing radiation]] to penetrate solid matter. Typical alpha particles (α) are stopped by a sheet of paper, while beta particles (β) are stopped by 3mm aluminum foil. Gamma radiation (γ) is dampened when it penetrates lead. Note caveats in the text about this simplified diagram.{{clarify|date=March 2020|reason=The text does not mention the diagram. The caveats should probably be listed in a note using Template:Efn}}]] |
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[[File:Details of types of Radiation.png|border|right|frameless| |
[[File:Details of types of Radiation.png|border|right|frameless|597xhi h8 inkhlbjkn597px]] |
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[[File:Radioactive.svg|thumb|upright|The international symbol for ionizing radiation (radioactivity) that is unsafe for [[Radiation shield|unshielded]] humans. Radiation, in general, exists throughout nature, such as in light and sound.]] |
[[File:Radioactive.svg|thumb|upright|The international symbol for ionizing radiation (radioactivity) that is unsafe for [[Radiation shield|unshielded]] humans. Radiation, in general, exists throughout nature, such as in light and sound.]] |
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In [[physics]], '''radiation''' is the emission or transmission of [[energy]] in the form of [[wave]]s or [[particle]]s through space or a material medium.{{cite web |url=http://scienceworld.wolfram.com/physics/Radiation.html |title=Radiation |last=Weisstein |first=Eric W. |website=Eric Weisstein's World of Physics |publisher=Wolfram Research |access-date=2014-01-11}}{{cite web |url=http://www.thefreedictionary.com/radiation |title=Radiation |website=The free dictionary by Farlex |publisher=Farlex, Inc. |access-date=2014-01-11}} This includes: |
In [[physics]], '''radiation''' is the emission or transmission of [[energy]] in the form of [[wave]]s or [[particle]]s through space or a material medium.{{cite web |url=http://scienceworld.wolfram.com/physics/Radiation.html |title=Radiation |last=Weisstein |first=Eric W. |website=Eric Weisstein's World of Physics |publisher=Wolfram Research |access-date=2014-01-11}}{{cite web |url=http://www.thefreedictionary.com/radiation |title=Radiation |website=The free dictionary by Farlex |publisher=Farlex, Inc. |access-date=2014-01-11}} This includes: |
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* ''[[electromagnetic radiation]]'' consisting of [[photon]]s, such as [[radio wave]]s, [[microwaves]], [[infrared]], [[visible light]], [[ultraviolet]], [[x-ray]]s, and [[Gamma ray|gamma radiation (γ)]] |
* ''[[electromagnetic radiation]]'' consisting of [[photon]]s, such as [[radio wave]]s, [[microwaves]] |
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* ''[[particle radiation]]'' consisting of particles of non-zero [[rest energy]], such as [[alpha radiation]] (α), [[beta radiation]] (β), proton radiation and [[neutron radiation]] |
* ''[[particle radiation]]'' consisting of particles of non-zero [[rest energy]], such as [[alpha radiation]] (α), [[beta radiation]] (β), proton radiation and [[neutron radiation]] |
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* ''[[acoustics|acoustic]] radiation'', such as [[ultrasound]], [[sound]], and [[seismic wave]]s, all dependent on a physical [[transmission medium]] |
* ''[[acoustics|acoustic]] radiation'', such as [[ultrasound]], [[sound]], and [[seismic wave]]s, all dependent on a physical [[transmission medium]] |
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