Difference between revisions of "Photon"
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===About Photons=== | ===About Photons=== | ||
: The '''photon''' is denoted with the lower case Greek letter <math>\gamma</math> (gamma). | : The '''photon''' is denoted with the lower case Greek letter <math>\gamma</math> (gamma). | ||
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: '''Photons''' carry [[energy]] from one place to another. | : '''Photons''' carry [[energy]] from one place to another. | ||
| + | : '''Photons''' have no [[mass]] or [[Electrical Charge|charge]] | ||
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| + | ===About Virtual Photons=== | ||
| + | : '''Virtual photons''' a [[model]] for the mechanism of action of the [[Electromagnetic Interaction|electromagnetic interaction]], but they are not strictly 'real'. | ||
| + | : '''Virtual photons''' have no [[mass]] and therefore can mediate the [[Electromagnetic Interaction|electromagnetic interaction]] over an infinite range. | ||
| + | : '''Virtual photons''' carry [[momentum]] without carrying [[mass]] and are therefore able to change the direction of motion of other [[Subatomic Particle|subatomic particles]]. | ||
| + | : '''Virtual photons''' do not carry [[Electrical Charge|charge]], but allow [[Subatomic Particle|particles]] with [[Electrical Charge|charge]] to exchange [[momentum]]. | ||
===Equations=== | ===Equations=== | ||
Revision as of 14:55, 20 July 2019
Contents
Key Stage 5
Meaning
Photons (\(\gamma\)) are bosons responsible for mediating the electromagnetic interaction and are the particle associated with electromagnetic waves.
About Photons
- The photon is denoted with the lower case Greek letter \(\gamma\) (gamma).
- Photons carry energy from one place to another.
- Photons have no mass or charge
About Virtual Photons
- Virtual photons a model for the mechanism of action of the electromagnetic interaction, but they are not strictly 'real'.
- Virtual photons have no mass and therefore can mediate the electromagnetic interaction over an infinite range.
- Virtual photons carry momentum without carrying mass and are therefore able to change the direction of motion of other subatomic particles.
- Virtual photons do not carry charge, but allow particles with charge to exchange momentum.
Equations
Momentum of a Photon
\(p = \frac{h}{\lambda}\)
Where
\(p =\) The momentum of the photon.
\(h = \) Planck's Constant (\(6.63\times10^{-34}Js\)).
\(\lambda =\) The wavelength of the wave associated with the photon.
Energy of a Photon
\(E = hf\)
Where
\(E =\) The energy of the photon.
\(h = \) Planck's Constant (\(6.63\times10^{-34}Js\)).
\(f =\) The frequency of the wave associated with the photon.
The Speed of Light
\(c = f\lambda\)
Where
\(c =\) The speed of light (\(3.00\times10^{8}ms^{-1}\) in a vacuum).
\(\lambda =\) The wavelength of the wave associated with the photon.
\(f =\) The frequency of the wave associated with the photon.