Astonishing Legends cover image

Interstellar with Dr. Avi Loeb

Astonishing Legends

00:00

The Power of a Laser Pointer

I thought that over large distances, lasers actually did, the light did disperse a little bit. How does that work? Is there low pressure or? Did you ever play tennis? Yes. Okay. If you are using just a laser pointer, it would push it so slowly that you won't be able to keep it focused on the sale. The same can happen if you now replace the molecules of air with the particles of light. Light is made of particles called photons. And when those bounce off a material surface, let's say a mirror, they give it a push. Usually the push is very small but if you make your mirror lightweight, then you would fill this push.

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