Understanding Photons
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Physics › Understanding Photons
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1
Why is it that photons can move at the speed of light, but other particles cannot?
Photons do not have mass
Photons contain more energy than other particles
Photons are similar in size to electrons
Photons lack electrical charge
Explanation
Photons can move at the speed of light because they have no mass. Anything with mass can not be accelerated to the speed of light—it takes an infinite amount of energy to do so. We can get very close, but never exactly there.