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Results tagged with absolute-units
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user 5788
Absolute units, or natural units, are a system of units where certain dimensionful constants are set to 1. This often simplifies various formulae.
6
votes
Why didn't we replace our SI units with a better system?
Because it's a good thing that in physics we use the same units as in everyday life (at least, outside of a handful of countries which shall remain nameless). It makes things easier to explain, easier …
- 28.6k
1
vote
Why aren't Faraday's law of induction and Maxwell-Ampere's law (without sources) symmetric?
In Gaussian units, we set $\epsilon_0 = \frac1{4\pi}$ (and so $\mu_0 = \frac{4\pi}{c^2}$) and change the units of $B$ so both electric and magnetic fields have the same dimension. In these units, Maxw …
- 28.6k
11
votes
Can a half life be given in electron volts?
I think I found your answer in the glossary section (slightly edited):
$T_{1/2}$ [the half-life] is related to (...) the width $\Gamma$ by
$$ T_{1/2} = \frac{\hbar \ln 2}{\Gamma}$$
where $\hbar$ is t …
- 28.6k