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**Physics, Astronomy & Cosmology / Re: Was the Big Bang the beginning of the universe?**

« **on:**28/10/2019 08:28:50 »

As the strict definition is concerned, you are right but inertia is always measured with an exchange of momentum in reality. A photon has a relativistic mass. You can say its a relativistic inertial mass only in its direction of motion. I know that strictly speaking, it is not the same but in the end, it could be the same basic phenomenon and there are good reasons to think that way.

The calculation of an effective radius of an electron depends on the theory. It is the measurement which counts. It is a circular argument. Do you know that the maximum electric field you can measure for an electron is equivalent to a charge at a distance equal to its Compton wavelength divided by 2*pi? (at least for a slow electron)

The calculation of an effective radius of an electron depends on the theory. It is the measurement which counts. It is a circular argument. Do you know that the maximum electric field you can measure for an electron is equivalent to a charge at a distance equal to its Compton wavelength divided by 2*pi? (at least for a slow electron)