IEC 60050 - International Electrotechnical Vocabulary


IEVref:	113-07-09		ID:
Language:	en		Status: Standard

Term:	Lorentz factor
Synonym1:
Synonym2:
Synonym3:
Symbol:	$γ$
Definition:	factor used in relativistic physics $γ : = \frac{1}{\sqrt{1 - β^{2}}}$ where $β$ is normalized speed Note 1 to entry: The Lorentz factor is used, for example, for relativistic mass $m^{'} = γ m$ , Lorentz contraction $d^{'} = d / γ$ , and time dilatation $Δ t' = γ Δ t$ . Note 2 to entry: For the transfer of matter, $1 \leq γ < \infty$ . Note 3 to entry: The coherent SI unit of the Lorentz factor is one, symbol 1.
Publication date:	2022-06
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γ:= 1 1− β 2 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeq4SdCMaia OOcQdacqGH9aqpdaWcaaqaaiaaigdaaeaadaGcaaqaaiaaigdacqGH sislcqaHYoGydaahaaWcbeqaaiaaikdaaaaabeaaaaaaaa@3F79@ β MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqipu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeqOSdigaaa@3778@ normalized speedNote 1 to entry: The Lorentz factor is used, for example, for relativistic mass

m^{'} = γ m

, Lorentz contraction

d^{'} = d / γ

, and time dilatation

Δ t' = γ Δ t

. Note 2 to entry: For the transfer of matter,

1 \leq γ < \infty

. Note 3 to entry: The coherent SI unit of the Lorentz factor is one, symbol 1.