- #1
H_Psi
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Hey,
I am starting to learn the basics of QED and I am trying to get acquainted with the units and scales that are used.
The exercise is to estimate the energy, time and length that correspond to the mass of an electron.
That’s what I did:
The mass of an electron is 9.11E-31 kg.
Energy:
E=mc^2 gives me an energy of 0.511MeV.
Length:
Here I used the equation: c * hbar = 197 MeV * fm
-> 386fm = c * hbar / (0.511MeV)
-> In natural units: 386fm = 1 / (0.511MeV)
Time:
Here I used the equation: hbar = 6.58E-22 MeV * s
-> 1.288E-21 s = hbar / (0.511MeV)
-> In natural units: 1.288E-21 s = 1 / (0.511MeV)
Is this calculation correct? Is that the way one can calculate the length and time corresponding to a mass?
Thanks
I am starting to learn the basics of QED and I am trying to get acquainted with the units and scales that are used.
Homework Equations
The exercise is to estimate the energy, time and length that correspond to the mass of an electron.
The Attempt at a Solution
That’s what I did:
The mass of an electron is 9.11E-31 kg.
Energy:
E=mc^2 gives me an energy of 0.511MeV.
Length:
Here I used the equation: c * hbar = 197 MeV * fm
-> 386fm = c * hbar / (0.511MeV)
-> In natural units: 386fm = 1 / (0.511MeV)
Time:
Here I used the equation: hbar = 6.58E-22 MeV * s
-> 1.288E-21 s = hbar / (0.511MeV)
-> In natural units: 1.288E-21 s = 1 / (0.511MeV)
Is this calculation correct? Is that the way one can calculate the length and time corresponding to a mass?
Thanks