Find the mass, the kinetic energy and the momentum of an electron moving at 0.8c.
As we know the moving object appears to be heavier in the moving frame that’s because of Lorentz transformation known as apparent mass which is given by
Where , V is velocity of moving object and C is speed of light in vacuum i.e.
And is mass at rest
Kinetic energy gained by the electron will be due to change in mass of electron.
Momentum of electron will be is equal to = Velocityapparent mass