Science > Physics > Hisenberg Uncertainty Principle - Uncertainty over h/(2*pi) & h/(4*pi)
| Topic: |
Science > Physics |
| User: |
"abs" |
| Date: |
02 Jul 2004 09:40:01 PM |
| Object: |
Hisenberg Uncertainty Principle - Uncertainty over h/(2*pi) & h/(4*pi) |
hi,
i am sure that most of us would have encountered this problem. why
do we find different versions of Uncertainty constant. is there a
scientific significance behind this or is it just gibberish. what is
the accepted standard ?
-sci fan.
.
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| User: "FrediFizzx" |
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| Title: Re: Hisenberg Uncertainty Principle - Uncertainty over h/(2*pi) & h/(4*pi) |
02 Jul 2004 11:30:07 PM |
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"abs" <ciitv@yahoo.com> wrote in message
news:19a422d8.0407021840.12cfd1ab@posting.google.com...
| hi,
| i am sure that most of us would have encountered this problem. why
| do we find different versions of Uncertainty constant. is there a
| scientific significance behind this or is it just gibberish. what is
| the accepted standard ?
| -sci fan.
I think you are mixing up h and hbar. Hbar = h/2pi, so when you see (delta
x)(delta p_x) >= hbar/2 is the same as h/4pi. Hbar is the reduced Planck
constant. Also delta x and delta p_x are sloppy notation. It should be
sigma_x and sigma_p where sigma is the standard deviation in x or p_x.
(sigma_x)(sigma_p) >= hbar/2
FrediFizzx
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| User: "Michael" |
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| Title: Re: Hisenberg Uncertainty Principle - Uncertainty over h/(2*pi) & h/(4*pi) |
03 Jul 2004 02:50:32 AM |
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I googled it, and it's supposed to be h/(4*pi). I guess people were
careless writing h or h_bar
http://scienceworld.wolfram.com/physics/UncertaintyPrinciple.html
ciitv@yahoo.com (abs) wrote in message news:<19a422d8.0407021840.12cfd1ab@posting.google.com>...
hi,
i am sure that most of us would have encountered this problem. why
do we find different versions of Uncertainty constant. is there a
scientific significance behind this or is it just gibberish. what is
the accepted standard ?
-sci fan.
.
|
|
|
|
| User: "Sam Wormley" |
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| Title: Re: Hisenberg Uncertainty Principle - Uncertainty over h/(2*pi) &h/(4*pi) |
02 Jul 2004 10:13:46 PM |
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abs wrote:
hi,
i am sure that most of us would have encountered this problem. why
do we find different versions of Uncertainty constant. is there a
scientific significance behind this or is it just gibberish. what is
the accepted standard ?
-sci fan.
See: http://scienceworld.wolfram.com/physics/UncertaintyPrinciple.html
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