How can we see laser? If i would point a basic red laser at a wall i would see a red point, but how? The photons from the laser cant reach my eye unless the laser is aimed very specificlly, Other photons can't bounce of the laser into my eye since light doesnt bounce of from light, so what is happening?
 A: You missed an important difference between a mirror and a wall.

A mirror is a very smooth surface.
Therefore, when a laser beam hits the mirror,
then its rays are all reflected to the same direction.
You can see the reflected laser light only
when your eye is at the right place.
(Do not actually try this. It would damage your eye.)

A wall is a very rough surface.
Therefore, when a laser beam hits the wall,
then its rays are all reflected to different directions.
You can see the reflected laser light from everywhere.
A: There are three different ways in which you can actually " see" a laser

*

*The laser beam directly and receiver Rai without any obstruction (extremely dangerous and therefore should never be tried)


*A laser beam bounces off that is gets reflected from a smooth or rough surface and a small fraction of it reaches your eyes.


*A laser beam is scattered as a result of the presence of particles in the medium. You throw plenty of dust in the path of a laser beam and then see some of the laser light getting scattered so that you are able to see the beam.
