Photon ❍｜appendage｜___｜20260628174208-01-•

A	B
Composition	Elementary particle
Statistics	Bose–Einstein statistics
Family	Gauge boson
Interactions	Electromagnetic, gravity
Symbol	γ
Theorized	Albert Einstein (1905) The name “photon” is generally attributed to Gilbert N. Lewis (1926)
Mass	0 (theoretical value) < 1×10${}^{-18}$ eV/c${}^2$ (experimental limit)1
Mean lifetime	Stable1
Electric charge	0 < 1×10${}^{-35}$ e (experimental limit)‍1
Color charge	No
Spin	1 ħ
Spin states	+1 ħ, −1 ħ
Parity	−11
C parity	−11
Condensed	I(J${}^{PC}$) = 0, 1 (1${}^{--}$)1

Photon

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Footnotes

1. Amsler, C.; et al. (Particle Data Group) (2008). “Review of Particle Physics: Gauge and Higgs bosons” (PDF). Physics Letters B. 667 (1): 1. Bibcode:2008PhLB..667…1A. doi:10.1016/j.physletb.2008.07.018. hdl:1854/LU-685594. S2CID 227119789. Archived from the original on 2018-12-25. Retrieved 2010-04-09. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶