What are the tiny particles in a laser beam ?

[valkia]

I have one of these too and im pretty sure its not dust. Its too.. formal and non irregular shapes and sizes like dust

 

[asim18]

So in a totally clean atmosphere or vaccuum the beam wouldnt be visible ?

http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/how_we_see_things/read2.shtml

 

[Meridian]

I have one of these too and im pretty sure its not dust. Its too.. formal and non irregular shapes and sizes like dust

Dust is pretty regular in size and shape, because most of it is shed skin cells.


M

 

[Darkst4r]

I tried fanning the beam and it speeds up the movement of the particles and changes the direction. Dust it is

 

[Fuzz]

Have you been walking round with your eyes closed during what has elapsed of your life so far.
How could you not know this?

I fear for humanity.

 

[markweatherill]

I've noticed that in the beam you can see particles travelling up and/or down the beam. What are they ?

Those are Lasons.

 

[Darkst4r]

Have you been walking round with your eyes closed during what has elapsed of your life so far
How could not know this.

I fear for humanity

Judging by your poor grammar and lack of punctuation I too fear for humanity...

 

[guyfawkes5]

Those are Lasons.

Hahaha.

 

[Dinomania]

Speckles - maxima and minima: http://isaac.exploratorium.edu/~pauld/summer_institute/summer_day1perception/laser_speckle.html

 

[TheCenturion]

OT: I really don't like those lasers, far too many times I've had people trying to point them in my eyes

 

[Kutter]

sorry just had to...

 

[scrlk]

TBH, pointing a laser in another persons eye with intent should be made an offence (if it isn't already)

 

[Dinomania]

BTW - blue lasers are getting much cheaper - a young teacher in my current placement school has one - it's got a short enough wavelength to make tonic water fluoresce - it's very cool...

Like this: http://photos.psd202.org/Photos/displayimage.php?album=843&pos=10

 

[sid]

The particles are dust off which the beam scatters, it also the only way to see to see the laser along orthogonal propagation axes.

Hehe, I build lasers atm

 

[uknowist]

LASERS - PEW PEW

 

[sid]

LASERS - PEW PEW

They actually sound like AK47 if you've ever get to use a 10hz YAG system 600 round per minute

At 1kHz, its like a saw blade type of noise

 

[Aod]

TBH, pointing a laser in another persons eye with intent should be made an offence (if it isn't already)

it is.

 

[MrViper]

point it at a police helicopter and find out

 

[CliffyBiro]

TBH, pointing a laser in another persons eye with intent should be made an offence (if it isn't already)

Pretty sure it's why my right eye is so crap.

 

[Efour]

http://wiki.eveonline.com/en/wiki/Tachyon_Beam_Laser_II