Really depends on the size of the receiver. Its possible to use it at interplanetary distances if we are willing to build a mirror 10s of square miles in size. For point to point my guess would be a few miles. The horizon is the cutoff point for sure so one beam could never be more then the line of sight horizon at the altitude of the receiver for sure.
Really depends on the size of the receiver. Its possible to use it at interplanetary distances if we are willing to build a mirror 10s of square miles in size. For point to point my guess would be a few miles. The horizon is the cutoff point for sure so one beam could never be more then the line of sight horizon at the altitude of the receiver for sure.