When electrons move at high speeds, why is their mass LARGER than their rest mass? Why isn't it the opposite?
55971
Why does the (relativistic) mass of an object increase when its speed approaches that of light?
17619
How does rest mass become energy?
81880
How can a photon have no mass and still travel at the speed of light?
53259
Do photons have mass?
87598
Can we define the effective mass or the moving mass of a photon?
80749
If Energy can be converted into mass, why can it not be converted into charge?
130347
Why do objects with different masses fall at the same rate?
77792
What is the reason for extremely high speed of electric current?
55085
How come a photon acts like it has mass in a superconducting field?
22370
Does gravity affects on electrons in a noticeable way?
113896
How fast does an electron travel in a circuit?
156505
Is voltage the speed of electrons?
6296
Why do electrons move towards anode in the Photoelectric effect experiment?
41041
Does a photon instantaneously gain $c$ speed when emitted from an electron?
116627
Why doesn't a charged particle moving with constant velocity produce electromagnetic waves?
79842
Why do accelerating electrons emit radiation?
88227
Why is the ampere a base unit and not the coulomb?