e/m Ratio ???

Question

Can we get e/m ratio theoratically? where e=charge on electron m=mass of electron I am asking this because Sir J.J.Thomson performed an exepriment for that.

Answer 1

Only if you know the charge and the mass. At another philosophical level, it's simply a consequence of our choice of the definitions of units for charge and mass. At yet another level, why is there charge and why does it have the value it has?

If I were a scientist exploring this, I would try to find or develop a system of equations to describe the properties of matter and forces based on the strength of the charge as it is in this universe. Then, I would try to calculate the consequences of differing values for the charge. Would chemical reactions become difficult or impossible? Would a different balance between the electric force and the weak and strong forces cause the electron cloud to simply collapse into the nucleus and turn the world into inert, dense masses of neutrons?

If there's a fundamental reason for the value of the charge, this would probably help figure out what it is. Otherwise, it might just come down to, "Because that's the value God chose for it."

Answer 2

I believe that one of the limitations with our current understanding of physics is the masses of fundamental particles have to be input into the equations. So if you are asking if there is a way to calculate the charge or mass, similar to the way Maxwells's equations lead to a calculation for the velocity of light, I do not believe so (at this time).

Answer 3

Actually I also performed that but I forgotten