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Jnoper t1_ixpcw1o wrote

Now imagine they focus that beam to say 5ft. What’s stopping them from adding a mirror?

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darkshark9 t1_ixpdogw wrote

The laws of physics won't let us focus a beam that tightly over that distance due to its diffraction limit.

Shine a laser at the moon and the beam spot is like 50km wide by the time it reaches it.

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