Is electron moves with the speed of light and if it moves then why its mass is not equal to infinity?

Question

we know that a particle moves with the speed of light or more than the speed of light then its mass will be greater than the mass of universe.So why is not with electron?

Answer 1

Neither electric signals (in a wire) nor electrons move at the speed of light. There are two velocities that apply to the movement of current through a wire; one is the drift velocity, which is very slow (less than one mm/sec in copper). The other is the propagation velocity of signals carried by the current. This is the speed that determines how soon the light turns on after the switch is thrown. For copper wire, that speed is about 2/3 the speed of light. That is fast, but nowhere near the speed of light. However, no material particle travels that speed--electrons will have random motion with speeds up to 10^5 m/sec. With no field applied, the random movements cancel out and there is no net drift. When a field (voltage difference across the wire) is applied, the random movement no longer cancels and there is net drift of electrons in the wire. However, even the maximum random velocity is nowhere near light velocity (which is 3*10^8 m/sec).

Answer 2

for someone who has for sure made no longer a lot of an attempt to comprehend relativity, you look very desirous to push aside all of it. and very incorrect about each little thing you suggested. a million. Photons haven't got any mass, even at relax. As others have stated, photons won't be able to truly be at relax; they in elementary words make experience at the same time as vacationing on the speed of sunshine. 2. Electrons won't be able to be made to holiday on the speed of sunshine in a vacuum. in a lot of elements, mild will propagate at a velocity less than 'c', and hence in some circumstances issues can holiday swifter than the community velocity of sunshine. no longer some thing can ever holiday swifter than the speed of sunshine in a vacuum, that's c. 3. p=mv is a classical formula, hence it really is inapplicable to relativistic circumstances. The relativistic formula you want is E^2 = p^2 c^2 + m^2 c^4. This shows that even a 0 mass particle which incorporates a photon may have momentum. i understand relativity will be counterintuitive each so often... yet in basic terms because it really is not any longer element of our universal adventure would not propose that it really is superstitious or hogwash.

Answer 3

Don't confuse electrons with electricity. Electricity moves through a copper wire at nearly the speed of light, but the electrons move about as fast as you can walk.

Electricity moves through your nerves at about 100 miles per hour.

Answer 4

Because it has no rest mass. The principle you are talking about only applies to an object that has mass at rest.

Answer 5

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