| gamma ray | has frequency 3 EHz or more |  |
| has wavelength 100 pm or less | |
| has definition Electromagnetic radiation similar to X-radiation, although of shorter wavelength, emitted spontaneously by some radioactive substances from atomic nuclei during radioactive decay. | |
| has definition An electromagnetic wave with a wavelength in the range of 10-13 to 10-10 meter, corresponding to photons with energy in the range of 104 to 107 electron volts. | |
| has definition Electromagnetic radiation with a wavelength less than about 1 Å (10-10 m); blends from the "hard" X-ray region. Photons of energy greater than about 10 keV. | |
| has definition Rays first discovered in radioactive material, and later identified as very high energy photons. | |
| has definition Extremely short-wavelength electromagnetic energy. | |
| has definition Photons of very high frequency and very short wavelength; the most energetic and penetrating form of electromagnetic radiation. | |
| has definition Photon of very high frequency (wavelength shorter than a few tenths of an angstrom); the most energetic form of electromagnetic radiation, although there is no sharp boundary between γ-ray photon and an X-ray photon. Usually γ-ray photons come from the nucleus and X-ray photons come from the inner orbital electrons. Galactic γ-ray photons seem to originate primarily in the spiral arms. | |
| is a kind of photon | |
| photon | has spin 1 | |
| has synonym electromagnetic radiation | |
| carries the force electromagnetism | |
| massless particle | has mass 0 | |
| neutral particle | is not accelerated by electric or magnetic fields | |
| has charge 0 | |
| wave | has propagation direction | |
| particle | obeys uncertainty principle | |
| boson | has quantum behavior Bose-Einstein statistics | |
| harmonic motion | has amplitude | |
| has period | |
| physical process | has domain physics | |
| physical object | has location or center of gravity | |
| has angular momentum | |
| has velocity | |
| has momentum | |
| has temperature | |
| has volume | |
| has extent | |
| has material | |
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