Light is massless and has no charge unlike a rock that has charge and mass, but we dont know what the mass really is, so is the mass = charge and the charge is directly proportional to the mass?
Please help I am learning a lot about charge and mass etc.
Yes there may be a relationship between mass and charge.
The only exception we often deal with is neutrino's, the only particle as far we believe that has a very small mass, vanishingly small in fact, but is believed to have zero charge. Whether this is true in nature, may be a matter of theory, for instance, maybe the neutrino equally has a vanishingly small but non-zero charge with respect to its mass? I certainly believe this is possible.
Mass has also shown to be related to Weyl invariance
Which is by definition, the electromagnetic Planck charge equal to some definition of a charge in terms of its mass. In the past if my memory serves me right, charged massless particles was once predicted in the standard model from Yukawa physics, but was later ruled out.
More recently, Weyl fermions have been discovered which may lead the way to creating electrons ''without mass.'' Equally, the Weyl fermion is allowed to have a charge yet, will remain massless.
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