| Topic: |
Science > Physics |
| User: |
"" |
| Date: |
30 Mar 2006 02:40:13 PM |
| Object: |
Double Slit |
I'm setting up a double slit expiriment but am having difficulties.
I've actually been able to see the interfearance pattern when I held a
mirror cut with two slits in one hand and the laser in the other, but
it wasn't very impressive. I have a 650nm laser pointer to run the
expiriment with and am trying to build an art project. Could you give
me a suggestion on how to do this in a simpler way because I am having
trouble permanently positioning the laser with the mirror. I read I
could simply cut the laser in half with a card to reproduce the effect
but I don't see an interfearance pattern when I do this.
Thanks
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| User: "" |
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| Title: Re: Double Slit |
30 Mar 2006 03:04:18 PM |
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wrote:
I'm setting up a double slit expiriment but am having difficulties.
I've actually been able to see the interfearance pattern when I held a
mirror cut with two slits in one hand and the laser in the other, but
it wasn't very impressive.
Most double slit experiments are like most lasers, and are
extremely dull, since they have nothing to do with
quantum mechanics, or physics at all/ For any interferon experiment,
no matter what kinds of waves are interfering, you
have to set the interfeing target structures up just right
to observe anything.
So to observe anything at 650 nm, you need to a get
a chemist who has a mircowave band interferonmeter first.
And then to see laser interference you need
a mirror with non-random grains at about 1 micron.
But most mirrors you buy from stores have
randomly oriented grains, so the reflection
patterns don't show monochromatic reflections.
You might try to reflect the laser off the edge
of a razor blade, rather than a mirror.
I have a 650nm laser pointer to run the
expiriment with and am trying to build an art project. Could you give
me a suggestion on how to do this in a simpler way because I am having
trouble permanently positioning the laser with the mirror. I read I
could simply cut the laser in half with a card to reproduce the effect
but I don't see an interfearance pattern when I do this.
Thanks
.
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| User: "" |
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| Title: Re: Double Slit |
30 Mar 2006 03:18:43 PM |
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I don't know why you say that because I got the expiriment to work now.
I just glued the mirror to the end of the laser pointer, and when I
shine it in the dark there is a clear interference patter. It looks
like: | | | || | | |
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| User: "T Wake" |
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| Title: Re: Double Slit |
30 Mar 2006 03:28:54 PM |
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<CoreyWhite@gmail.com> wrote in message
news:1143753523.475258.296260@g10g2000cwb.googlegroups.com...
I don't know why you say that because I got the expiriment to work now.
I just glued the mirror to the end of the laser pointer, and when I
shine it in the dark there is a clear interference patter. It looks
like: | | | || | | |
Sorry, who are you talking to here? Who said what?
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| User: "" |
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| Title: Re: Double Slit |
30 Mar 2006 04:27:40 PM |
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The post appeared on google groups but it isn't important.
Can anyone tell me how I can build a detector into my double slit
expirement so that I can prove that when the photons passing through
the slit are being observed, they function as a particle?
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| User: "" |
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| Title: Re: Double Slit |
30 Mar 2006 06:35:11 PM |
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wrote:
I don't know why you say that because I got the expiriment to work now.
I just glued the mirror to the end of the laser pointer, and when I
shine it in the dark there is a clear interference patter. It looks
like: | | | || | | |
Well that looks more like a diffraction pattern, rather than an
interference pattern though. For a diffraction pattern, you
don't even need a mirror. you can shine the laser
on a rock or the moon.
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| User: "Gregory L. Hansen" |
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| Title: Re: Double Slit |
31 Mar 2006 07:42:45 PM |
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In article <1143751213.151261.139880@g10g2000cwb.googlegroups.com>,
<CoreyWhite@gmail.com> wrote:
I'm setting up a double slit expiriment but am having difficulties.
I've actually been able to see the interfearance pattern when I held a
mirror cut with two slits in one hand and the laser in the other, but
it wasn't very impressive. I have a 650nm laser pointer to run the
expiriment with and am trying to build an art project. Could you give
me a suggestion on how to do this in a simpler way because I am having
trouble permanently positioning the laser with the mirror. I read I
could simply cut the laser in half with a card to reproduce the effect
but I don't see an interfearance pattern when I do this.
Thanks
Use a wire. Select the diameter to get the distance between maxima that
you want.
--
"Experiments are the only means of knowledge at our disposal. The rest is
poetry, imagination." -- Max Planck
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