In quantum physics, the photon (from Greek φως, "phōs", meaning light) is the quantum of the electromagnetic field (light). That is to say, electromagnetic fields are made up of large numbers of photons, and the electromagnetic interaction is mediated by the exchange of virtual photons. The term photon was coined by Gilbert N. Lewis in 1926.

The photon is one of the elementary particles. Its interactions with electrons and atomic nuclei account for a great many of the features of matter, such as the existence and stability of atoms, molecules, and solids. These interactions are studied in quantum electrodynamics (QED), which is the oldest part of the Standard Model of particle physics.

In many circumstances, a photon acts as a classical particle, for instance when registered by the light-sensitive device in a camera. In other circumstances, a photon acts like a classical wave, as when passing through the optics in a camera. According to the so-called wave-particle duality of quantum physics, it is natural for the photon to display either aspect of its nature, according to the circumstances. Normally, light is formed from a large number of photons, with the intensity related to the number of them. At low intensity, it requires very sensitive instruments, used in astronomy or spectroscopy, for instance, to detect the individual photons.

More on [ Photon ]

Photon - Twitter Search

Tender: http://bit.ly/4xZX7d 2009-539 Supply Installation and Training 2 Photon Excitation System - Dalhousie University
KenLeighton (Ken Leighton) Tue, 22 Dec 2009 14:35:56 -0000
Tender: http://bit.ly/4xZX7d 2009-539 Supply Installation and Training 2 Photon Excitation System - Dalhousie University
Having problems with Reliance USB Modem and Ubuntu 9.10.. strangely Tata Photon plus works. though both have same Huawei hardware.. Help pl.
rviswana (rviswana) Tue, 22 Dec 2009 14:25:46 -0000
Having problems with Reliance USB Modem and Ubuntu 9.10.. strangely Tata Photon plus works. though both have same Huawei hardware.. Help pl.
Tata Teleservices Partners with Novatium for its Photon Pro and Photon Plus community http://bit.ly/7hI58L #Money
IndyaNews (India News) Tue, 22 Dec 2009 13:44:59 -0000
Tata Teleservices Partners with Novatium for its Photon Pro and Photon Plus community http://bit.ly/7hI58L #Money
hmm - damn no photon in #pune no use then ...
akisaxena (akisaxena) Tue, 22 Dec 2009 13:24:52 -0000
hmm - damn no photon in #pune no use then ...
whats the word on tata photon - any good ? 3 mbps tops says the salesperson #bite?
akisaxena (akisaxena) Tue, 22 Dec 2009 13:23:53 -0000
whats the word on tata photon - any good ? 3 mbps tops says the salesperson #bite?
I'm testing a Photon ROM, ..but, I'm in holyday, see you the next year!
udKROM (udK) Tue, 22 Dec 2009 13:20:18 -0000
I'm testing a Photon ROM, ..but, I'm in holyday, see you the next year!

Subscribe to Photon RSS feed