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TeleDu
Modified 10mW Greenie
Joined: 15 Sep 2006
Posts: 16
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 Posted: 5/23/07, 6:46 AM Post subject: |
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57. Holography, Observing Holograms - In a darkened room, expand a laser beam with a diverging lens. Hold a hologram is the laser beam path and allow the laser light to enter your eyes. Search for the holographic image within an angle of 20-40 degrees to the right or left of the laser but DO NOT stare directly into the laser.
This one is amasing. I study physics and this semester we have optics. The lecturer showed us a few shards of what once used to be a glass sheet. They looked just like normal glass. Then he turned on a green laser with a diverging lens and if you looked just from the right angle (which was somewhat not easy to find) you could see the whole incredible holographic image in any one of the shards! |
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compuwiz
Nexus Laser
Joined: 07 Sep 2006
Posts: 102
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| Posted: 5/23/07, 1:30 PM Post subject: |
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| maybe i will have more time in the summer, some of those actually look interesting |
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leslieodell
Elite Laser
Joined: 29 Mar 2007
Posts: 153
Picture(s): 39
Movie(s): 1
Location: USA
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| Posted: 5/29/07, 3:39 PM Post subject: |
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cool post i will have to try some of them
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now witch end do i use ? |
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blargh
Phoenix Laser
Joined: 16 Oct 2006
Posts: 79
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| Posted: 5/29/07, 3:53 PM Post subject: |
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wo this is really helpful  im gona try some |
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Raul-Wesche
Fusion Laser
Joined: 06 Jul 2007
Posts: 330
Picture(s): 31
Movie(s): 22
Location: Martinez Ca
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| Posted: 7/30/07, 1:50 AM Post subject: |
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| WOW, too many letters, add some pics |
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submersed
Modified 10mW Greenie
Joined: 30 Jul 2007
Posts: 12
Picture(s): 12
Movie(s): 1
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| Posted: 8/06/07, 2:11 PM Post subject: |
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| Nice thread man, I've been looking for something like this. I was wondering what I was going to do with it once I lit a match and popped a balloon. |
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DHBREUER
25mW Classic Wicked Laser
Joined: 06 Aug 2007
Posts: 27
Location: The Hague, Netherlands
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| Posted: 8/07/07, 2:52 AM Post subject: |
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| OK, still have a lot to check with my laser.. Nice tips |
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madlogik
Modified 10mW Greenie
Joined: 10 Dec 2005
Posts: 11
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| Posted: 8/13/07, 6:27 PM Post subject: |
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you can take bat's blood with panda urine into a Russian crystal bowl and get a nice flash in your eyes as well.!
*sarcasm about the materials used in those experiments* |
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Ridders
Modified 10mW Greenie
Joined: 03 Jan 2006
Posts: 12
Location: UK
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| Posted: 8/29/07, 7:28 AM Post subject: |
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| Can we all take one experiment each and post the pictures LOL. It would take me a month just to read them all , never mind try them. It still gets me why sometimes i shine the green laser on red objects and it appears green, yet some objects it appears as a yellow or orange dot. Must be something to do with the absorption of some plastics compared to others |
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blomboy
25mW Classic Wicked Laser
Joined: 20 Dec 2007
Posts: 39
Location: South Carolina
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| Posted: 1/01/08, 8:21 PM Post subject: Re: 101+ L |
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| Athoul wrote: |
Here's over 100 experiments you can do with a laser. Great for anyone looking for something to do other then popping balloons and lighting matches etc.
1. Scattering Beam Visibility in Air - Shake chalk dust in the laser beam path. The beam is in visible in a dust free room but the particles scatter the light enabling us to "see" it. This demonstration is most effective in a completely darkened room. Although chalk dust is very effective, it can harm computers and other electronic apparatus in a science classroom. You can substitute most aerosol sprays and fog from cold-mist humidifiers. But avoid hair spray and similar materials that can clog the lungs.
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Couldn't the chalk dust harm your lense?
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Peace  Blom |
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