Optical Trapping or Laser Floatin'
These are a few short clips illustrating the phenomenon of optical trapping. Essentially, a felt tip marker is briefly burned just above the focal point of a ~250mW 650nm laser, releasing an extremely small particle. This is not the intersection between the laser and some smoke; it's an actual particle embedded in the laser beam.
Because radiation can exert pressure on objects, there is a set of force vectors always keeping the particle just above the waist of the beam. This phenomenon illustrates how light can behave as particles (photons) because the photons have momentum and are therefore able to impart forces onto objects. It is even possible to move the laser around gently and the particle will follow along.
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Hi. I'm the original creator of the vid. I'm glad to see that people liked it so much.
For the original, see:
http://www.youtube.com/watch?v=4awR7JwvxCc&feature=player_embedded
And for more information on how optical trapping works and a few pictures, take a look at my blog post here:
http://blog.jwcxz.com/?p=522
Posted Jan-27-2010 Byjwcxz (10.18) 
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(5)
Nice upload man. I wonder who the firebug was who first discovered this?
Posted Jan-26-2010 ByST0N3PONY (5225.42) 
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(4)
wonder what kind of damage that light beam could cause?
Posted Jan-26-2010 Byfritoman (51.78) fritoman Send Message
(1)
It'll burn a marker.
Posted Jan-26-2010 Byviewer1962 (799.16) 
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thats what they said about computers back in the early 60's. there is more processing power in the card that sings happy birthday than the giant computer of the early days. its only a matter of time.
Posted Jan-26-2010 Byaxe3761 (11.02) 
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There will be laser weapons based on this principle coming up soon. Small particles accelarated inside the beam up to almost half lightspeed, penetrating any material.
Posted Jan-26-2010 Bycaspa7 (97.78) caspa7 View Channel Send Message
(3)
Did Alex Jones tell you that?
Posted Jan-26-2010 ByST0N3PONY (5225.42) 
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You've watched Eraser too many times.
Posted Jan-26-2010 BySpecialEd (496.64) SpecialEd View Channel Send Message
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He isn't far off. Boeing has already developed a tactical laser system.
http://tinyurl.com/y9cdv7t
http://tinyurl.com/ygbfwxj
Posted Jan-26-2010 Bymdscorpio71 (1119.02) 
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(2)
Of course lasers are weapons and will be in the future. I was simply referring to his silly science fiction.
Posted Jan-26-2010 ByST0N3PONY (5225.42) 
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(-3)
todays science fiction is tomorrows reality.
Posted Jan-26-2010 Bymdscorpio71 (1119.02) 
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(4)
Yes it would and weapons that blind have been specifically banned along with chemical and biological weapons. This despite wide spread rumour that the allies experimented with blindling lazers in the first Gulf war, the tinkers!
Posted Jan-26-2010 ByDunblane_Truth_Seeker (656.16) 
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(0)
Very interesting. I wonder how many small holes there are in that guy's ceiling.
Posted Jan-26-2010 Bynitramyar (60.58) 
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(3)
LOL a whole bunch.
Posted Jan-26-2010 ByKommisar (36.34) 
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(-1)
Very cool, thanks for posting.
Posted Jan-26-2010 ByBud911 (692.08) 
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(1)
Never seen this before.
voted - off to go research this a bit ...
Posted Jan-26-2010 Byspadata (894.20) 
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I shall have to try that on the new 2.2kw laser cutter we have at work, I'll let you know the results if I have any fingers left to type with.
Posted Jan-26-2010 Bykalamazoo (183.78) 
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(2)
when i see this i think propulsion using in space to move
Posted Jan-27-2010 ByGetzlaf15 (62.26) Getzlaf15 Send Message
(1)
trippy
Posted Jan-26-2010 Bysmokinweedallday (342.90) 
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You gotta love how videos like this bring out all the little Mr. Keyboard Wizards who use wikipedia to make themselves sound like they know what they're talking about.
Posted Jan-27-2010 ByCommentator (226.88) 
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Major coolness!
Posted Jan-26-2010 Byjuchat (345.34) juchat View Channel Send Message
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I was wishing he'd stuck that marker under laser so it would burn up/through, but it wasn't that experiment I see...
Good post anyway, like it :)
Posted Jan-27-2010 Bymarkoni (380.48) 
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What grade lazer would that be ?
Posted Jan-28-2010 ByDR.F00 (10.08) DR.F00 View Channel Send Message
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wtf are you talking about dude, LOL
Posted Jan-30-2010 ByDrugs_R_Fun_020 (17.00) 
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