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- A photon is the most basic, discrete packet of energy that light or any electromagnetic wave can exist in. It is an elementary particle with no mass and no electric charge, yet it carries both energy and momentum, allowing it to travel through space and interact with matter.
www.sciencefacts.net/photon.htmlPhoton: Definition, Properties, and Applications - Science Facts
Aug 17, 2020 · Photons are the packets of energy released by continuous oscillation of charges. But I have some questions about this. Since the electrons oscillate regularly while transitioning between orbitals then why is the energy released in the form of packets and not continuously in the form of waves ?
During a molecular, atomic or nuclear transition to a lower energy level, photons of various energy will be emitted, ranging from radio waves to gamma rays. Photons can also be emitted when a particle and its corresponding antiparticle are annihilated (for example, electron–positron annihilation ).
- Photon Properties
- Word Origin
- Photon Symbol
- History
- How Are Photons produced?
- How to Calculate The Energy of A Photon
- References
Photons have the following properties: 1. A photon has zero rest mass. However, because it is moving, it has momentum. So, while packets of light have no mass, they can exert pressure. A photon’s momentum is hν/c, where h is Planck’s constant, ν is the photon’s frequency, and cis the speed of light. 2. A photon has no electrical charge. It is not d...
The name “photon” comes from the Greek word for light, phôs. Gilbert Newton Lewis coined the term in his December 1926 letter to Nature. However, it had been used by physicists and physiologists prior to this date, mainly referring to the illumination of the eye. Arthur Compton popularized the term in his work, giving Lewis credit for the word.
The Greek letter gamma (γ) is the symbol for the photon, probably deriving from work on gamma rays, which were discovered by Paul Villard in 1900. Gamma decay releases photons. The symbol hν refers to photon energy, where h is Planck’s constant and the Greek letter nu (ν) is the photon frequency. Another symbol is hf, where fis the photon frequency...
The concept of the photon arose from Albert Einstein’s proposed explanation for the photoelectric effect in 1905. The photoelectric effect is the emission of electrons when light strikes a material. Einstein said that the effect was explainable, providing light behaved as a group of discrete (quantized) energy packets rather than solely as a wave. ...
Photons arise as a result of both spontaneous and stimulated emission. Some types of radioactive decay (e.g., gamma and beta decay) release photons, as do particle interactions. Accelerating a charged particle causes photon emission as synchrotron radiation. The annihilation of a particle and its antiparticle (e.g., an electron and positron) result...
There are two main equations for calculating the energy of a photon: E = hν Here, E is the photon energy, h is Planck’s constant, and νis the photon frequency. E = hc / λ Here, E is photon energy, h is Planck’s constant, c is the speed of light, and λis the photon wavelength.
Alonso, M.; Finn, E.J. (1968). Fundamental University Physics. Vol. III: Quantum and Statistical Physics. Addison-Wesley. ISBN 978-0-201-00262-1.Feynman, Richard (1985). QED: The Strange Theory of Light and Matter. Princeton University Press. ISBN 978-0-691-12575-6.Halliday, David; Resnick, Robert; Walker, Jerl (2005). Fundamental of Physics(7th ed.). John Wiley and Sons, Inc. ISBN 978-0-471-23231-5.Lakes, Roderic (1998). “Experimental Limits on the Photon Mass and Cosmic Magnetic Vector Potential”. Physical Review Letters. 80 (9): 1826. doi:10.1103/PhysRevLett.80.1826Oct 24, 2024 · photon, minute energy packet of electromagnetic radiation. The concept originated (1905) in Albert Einstein’s explanation of the photoelectric effect, in which he proposed the existence of discrete energy packets during the transmission of light.
- The Editors of Encyclopaedia Britannica
Photons are generated when electromagnetic waves emitted by a source encounter matter, they may absorb and transfer their energy. Hence, photons can be created as well as destroyed while conserving energy and momentum.
Photons are the smallest possible particles of electromagnetic energy and therefore also the smallest possible particles of light. Photons can travel at the speed of light because they have no mass (thanks to relativity). Photons also have no charge.
