4 ms·
The power must be enormous at the source. It would degrade considerably from the source, inverse square law.
by dghughes 6y ago
The power must be enormous at the source. It would degrade considerably from the source, inverse square law.
- Turing_Machine 6y agoThe inverse square law only applies to a point source radiating uniformly in all directions. Laser and microwave beams, while they do suffer from losses over distance, aren't anywhere near that bad.
- cevans01 6y agoThe inverse square law still applies to directional transmitters and optical transmitters. It's just that their transmit gain is much much higher.