Einstein’s Theory of relativity – that light always travels at the same speed has always intrigued and perplexed me. With the Hubble telescope in space we can see light that has traveled for billions of light years.
A light photon has mass (as shown by the bending of light during a lunar eclipse.) For an object with even tiny mass to keep moving at constant speed over the billions of years without losing any speed is hard to imagine.
Is it because th oght is traveling in space that it doesn’t lose any energy?
If light can travel for such immense distances without losses then it seems like it would be much more efficient to transfer power using light than using electrical power transmission that has such high losses.
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