If the momentum of Einstein's energy is concerned with the motion of a particle whose velocity approaches the speed of light. What is the state of the energy?
Sunlight moves infinitely. Einstein's energy of sunlight is finite...?
Einstein's energy is a kind of kinetic energy.
Rana Hamza Shakil. Thanks for your answer.
Let K be kinetic energy, E be Einstein's energy, v be velocity of a particle with mass m, and c be the velocity of sunlight or other light.
Then, E = 2(K) = mc^2, if v = c.
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