Difference between revisions of "Photon"
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<math>p =</math> The [[momentum]] of the '''photon'''. | <math>p =</math> The [[momentum]] of the '''photon'''. | ||
| − | <math>h = </math> [[Planck's Constant]] (<math>6.63\times10^{-34}Js</math>) | + | <math>h = </math> [[Planck's Constant]] (<math>6.63\times10^{-34}Js</math>). |
<math>\lambda =</math> The [[wavelength]] of the [[Electromagnetic Wave|wave]] associated with the '''photon'''. | <math>\lambda =</math> The [[wavelength]] of the [[Electromagnetic Wave|wave]] associated with the '''photon'''. | ||
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<math>E =</math> The [[energy]] of the '''photon'''. | <math>E =</math> The [[energy]] of the '''photon'''. | ||
| − | <math>h = </math> [[Planck's Constant]] (<math>6.63\times10^{-34}Js</math>) | + | <math>h = </math> [[Planck's Constant]] (<math>6.63\times10^{-34}Js</math>). |
<math>f =</math> The [[frequency]] of the [[Electromagnetic Wave|wave]] associated with the '''photon'''. | <math>f =</math> The [[frequency]] of the [[Electromagnetic Wave|wave]] associated with the '''photon'''. | ||
Revision as of 10:58, 19 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 have no mass and therefore can mediate the electromagnetic interaction over an infinite range.
- Photons carry momentum without carrying mass and are therefore able to change the direction of motion of other subatomic particles.
- Photons do not carry charge, but allow particles with charge to exchange momentum.
- Photons carry energy from one place to another.
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
\(E = hf\)
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.