Electromagnetic radiation: Difference between revisions
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Created page with "* Radiation consisting of excited photons in varying frequencies * Certain categories overlap; boundary between types not strict, and categories are as much from radiative sou..." |
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* Radiation consisting of excited | * Radiation consisting of excited [[photon]]s in varying frequencies | ||
* Certain categories overlap; boundary between types not strict, and categories are as much from radiative source as from energy level | * Certain categories overlap; boundary between types not strict, and categories are as much from radiative source as from energy level | ||
* From least to most generally energetic: | * From least to most generally energetic: | ||
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**** Ranges from 3.1-120 eV | **** Ranges from 3.1-120 eV | ||
*** X-ray | *** X-ray | ||
**** Divided into soft X-rays (~ | **** Divided into soft X-rays (~100 eV-10 keV) and hard X-rays (10+ keV) | ||
**** Usually no more energetic than ~120 keV, but can be produced with energies upwards of 1 MeV; such are known as high-energy x-rays, or HEX-rays | **** Usually no more energetic than ~120 keV, but can be produced with energies upwards of 1 MeV; such are known as high-energy x-rays, or HEX-rays | ||
**** HEX-rays distinguished from low-energy gamma radiation by source: charged particles colliding with matter | **** HEX-rays distinguished from low-energy gamma radiation by source: charged particles colliding with matter | ||
Latest revision as of 08:49, 29 November 2017
- Radiation consisting of excited photons in varying frequencies
- Certain categories overlap; boundary between types not strict, and categories are as much from radiative source as from energy level
- From least to most generally energetic:
- Non-ionizing
- Radio
- Often used for STL communications
- Ranges <1.24 µeV
- Microwave
- Ranges from 1.24 µeV–1.24 meV
- Infrared
- Ranges from 1.24 meV-1.7 eV
- Visible light
- Ranges from 1.7-3.1 eV
- Radio
- Ionizing
- Ultraviolet
- Ranges from 3.1-120 eV
- X-ray
- Divided into soft X-rays (~100 eV-10 keV) and hard X-rays (10+ keV)
- Usually no more energetic than ~120 keV, but can be produced with energies upwards of 1 MeV; such are known as high-energy x-rays, or HEX-rays
- HEX-rays distinguished from low-energy gamma radiation by source: charged particles colliding with matter
- Gamma
- Generally 125+ keV, but some nuclear decay detected as low as 0.08 keV
- Low-energy gamma radiation distinguished from HEX-rays by source: produced by the nucleus of an atom, often through radioactive decay
- Ultraviolet
- Non-ionizing
- General properties