I read laser beams get wider, like a few feet wide by the time they hit the moon, Is that a manufacturing limit, or just something about the physics of laser light? Is a perfect laser beam that doesn’t get wider possible?

Question

I read laser beams get wider, like a few feet wide by the time they hit the moon, Is that a manufacturing limit, or just something about the physics of laser light? Is a perfect laser beam that doesn’t get wider possible?

In: 5280

Answer 1

This is why you should never aim laser at airplanes or helicopters, that tiny dot becomes a wall of blinding light by the time it reaches the airplane enveloping the entire cockpit.

https://i2-prod.mirror.co.uk/incoming/article7291921.ece/ALTERNATES/s810/Laser-strike-on-a-plane-near-Heathrow.jpg