Eli5: If a laser is shined into space will it continue to infinity (if it doesn’t hit a solid object)?

Question

Seems like a gargantuan, if not infinite amount of energy would be required for this to occur

In: 10

Answer 1

It depends on the quality of the laser and if it was disrupted passing through the atmosphere, but yes in principle if a laser is shined into space it will continue at the same power until it is blocked by something.