Red Laser reflection off any surface

[netrat]

If you have ever come across a laser pointer, you might have noticed that looking at laser reflection on any surface like a wall looks strange.

It looks like a sort of TV screen without cable connection. I mean it looks like a mixture of bright and dark spots. I hope i made myself clear.

Any explanation?

[insane_alien]

its just an interference patternt caused by the differing path lengths of light to reach your eye.

[John Cuthber]

There's more about it here

http://en.wikipedia.org/wiki/Speckle_pattern

[netrat]

Thanks alot!

Now i can sleep well.

[danielpower]

What about green laser reflection?

[insane_alien]

same for any laser. colour is immaterial in this case

Edited September 18, 2010 by insane_alien