Old 02-06-2013, 02:37 AM #1
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Default Can anyone explain the physics here?

Guy running this claims the laser is powerful enough to vaporize an object which somehow makes it "float" on top of the laser beam itself. The paper didn't even appear to be burned when he removed it.

Most powerful laser ever. - YouTube



Edit: Nvmnd, he's playing tricks. Good illusion though I guess.


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Old 02-06-2013, 02:41 AM #2
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Default Re: Can anyone explain the physics here?

"Most powerful laser" and he thinks it's a handheld?

Any way, just read the comments. It's just some string holding the paper up.

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Old 02-06-2013, 04:13 AM #3
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Default Re: Can anyone explain the physics here?

Closest to actually doing this in reality without string is called "optical trapping", it's used for microscopic tweezers.

If you have a decent power laser, get a felt tip marker and sit in a closed off room with as little airflow as possible, and burn the felt tip in the focal point, sometimes you'll get a little floating orb of particles stuck in the beam:

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Old 02-06-2013, 04:49 AM #4
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Default Re: Can anyone explain the physics here?

Quote:
Originally Posted by Things View Post
Closest to actually doing this in reality without string is called "optical trapping", it's used for microscopic tweezers.

If you have a decent power laser, get a felt tip marker and sit in a closed off room with as little airflow as possible, and burn the felt tip in the focal point, sometimes you'll get a little floating orb of particles stuck in the beam:
Neat! I had no idea you could do this with hobbyist lasers.
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Old 02-06-2013, 08:53 AM #5
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Default Re: Can anyone explain the physics here?

Was all the rage a couple years ago, it's a neat phenomenon
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Old 02-06-2013, 12:51 PM #6
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Default Re: Can anyone explain the physics here?

Here's a neat one...
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Old 02-06-2013, 11:22 PM #7
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Default Re: Can anyone explain the physics here?

Here it is....



BTW... without reading the comments I found it strange
that he needed to lift the piece of paper over the beam
to remove it rather than just pulling it towards him...


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Old 02-06-2013, 11:30 PM #8
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Default Re: Can anyone explain the physics here?

Guys read the comments he says "Its a trick" he even said he used a string
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Old 02-14-2013, 12:15 AM #9
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Default Re: Can anyone explain the physics here?

There's no physics here, just a fun trick
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Old 02-14-2013, 01:54 PM #10
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Default Re: Can anyone explain the physics here?

Just people spamming for likes.... But it is indeed really interesting!
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Old 02-14-2013, 02:28 PM #11
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Default Re: Can anyone explain the physics here?

wonder if you could do this trick with fishing rod string??
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Old 02-14-2013, 05:18 PM #12
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Default Re: Can anyone explain the physics here?

Quote:
Originally Posted by awillis2589 View Post
wonder if you could do this trick with fishing rod string??
Yup. But white thread may potentially be thinner and harder to see.
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Old 02-15-2013, 10:49 AM #13
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Default Re: Can anyone explain the physics here?

Meanwhile in real world,

Laser ablation - Wikipedia, the free encyclopedia

Laser ablation is when you hit a solid object with a laser so damn hard, that it gets converted into plasma, which being all super-hot and all, acts like propellant. It was in that what-if article months ago. Really awesome.

Though, I think you'd be able to tell if a piece of paper were converted into plasma.
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