- #1
DariusP
- 50
- 3
Hello, I've known about average laser rangefinders that we can use for domestic needs. They're relatively cheap and can measure up to 50 meters but that's about it.
However, I've read that military laser rangefinders are able to measure distances using light up to 20 kilometers. How is that possible? By Beer's law light should be attenuated exponentially when traversing some medium, so how does a light travel 40 kilometers and can still be deciphered out of noise? Surely they're not firing high intensity pulses for these measurements?
I've read about it here in the applications section: https://en.wikipedia.org/wiki/Laser_rangefinder
However, I've read that military laser rangefinders are able to measure distances using light up to 20 kilometers. How is that possible? By Beer's law light should be attenuated exponentially when traversing some medium, so how does a light travel 40 kilometers and can still be deciphered out of noise? Surely they're not firing high intensity pulses for these measurements?
I've read about it here in the applications section: https://en.wikipedia.org/wiki/Laser_rangefinder