Eli5: Why does light travel so fast?
In: 130
It’s because light has no mass.
Think of something really heavy. A push and it will move, but slowly. Now take something lighter. Give it the same push and it goes faster than the heavy thing. Now push something with no mass at all and ALL of the push goes instantly to the fastest speed the universe can handle; that’s the speed of light. Push any harder and instead of going faster, it changes color because it literally CAN’T take any more energy as speed, so it turns it into higher frequency (so a different color).
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