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Fickle Physics

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posted on Jun, 9 2005 @ 10:34 AM
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Fickle Physics is the science of constants and if they really are that constant and will remain constant. For example why is the speed of light precisely 300,000 km/s not any other figure. There has to some reason. If you can think of something post your thoughts.



[edit on 9-6-2005 by Byrd]




posted on Jun, 9 2005 @ 11:26 AM
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Most constants are very messy numbers, even the speed of light being 3x10^8 m/s is just a nice approximation used in schools. The real speed of light is 299,792,458 m/s.

It has yet to be prooved that these are even constant over time however... we've only been measuring them for a few hundred years.

What the *bleep* do we know?

Science is a tool for us to use to function, and understand the universe enough to function, in the end, we really know very little.



posted on Jun, 9 2005 @ 11:50 AM
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There has to some reason


Well the best reason would be that if it was any different we mightn't exist..

The Anthropic Principle



posted on Jun, 9 2005 @ 11:59 AM
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Actually, the speed of light as a constant has been under some debate because it's been violated in several experiments. The speed of light as a constant also goes completely out the window in quantum physics.

So perhaps the answer to the question is that the speed of light is a constant because we don't understand it well enough yet to realize that it isn't.



posted on Jun, 9 2005 @ 01:03 PM
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scientist have realized that as light is traveling it actually does encounter some resistance, it is photons you know, experly weaving its way through whatever it is surrounded by.
whil traveling in space, light encounters no resistance and therefor goes about 300000 k/h. traveling through the atmosphere it encouters resistance from the air around it.
Ever wanted to slow light? get a glass of water and bring it outside, as soon as the light hits the water, it slow and refracts. that is why if you stick a pencil halfway into a clear glass, and look at it from the side, the "2" pencils don't seem to connect. therefore the speed of light depends on the matter it is traveling through. making it a variable, not a constant



posted on Jun, 10 2005 @ 08:08 AM
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Nothing has violated the speed of light in a vacuum. If you've read something that claims something is moving faster than light, pay attention to what medium it's in.



posted on Jun, 10 2005 @ 08:10 AM
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And yes, constants are an interesting things, and if they were different we'd be living in an entirely different universe. There have been many colloquiums around these parts about that stuff.



posted on Jun, 10 2005 @ 08:23 AM
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Originally posted by T_Jesus
Nothing has violated the speed of light in a vacuum. If you've read something that claims something is moving faster than light, pay attention to what medium it's in.


i don't think you even tried to read my post dude... it says what u just repeated "while traveling in space, light encounters no resistance".



posted on Jun, 10 2005 @ 08:25 AM
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making it a variable, not a constant


No, the speed of light is not variable it is constant. The reason light takes longer to go through a translucent medium is that to go through it has to be constantly absorbed and re-emitted by the electrons in the medium. Light still travels at 3E8 it just seems to slow down because the absorbtion an re-emission take time as well.



posted on Jun, 10 2005 @ 08:33 AM
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"To be precise, what we usually call the "speed of light" is really the speed of light in a vacuum (the absence of matter). In reality, the speed of light DEPENDS on the material that light moves through. Thus, for example, light moves slower in glass than in air, and in both cases the speed is less than in a vacuum. However, the density of matter between the stars is sufficiently low that the actual speed of light through most of interstellar space is essentially the speed it would have through a vacuum, so we don't make MUCH error by ignoring the difference."

csep10.phys.utk.edu...


there IS a difference and scientist know it



[edit on 10-6-2005 by midgetstar]



posted on Jun, 10 2005 @ 12:27 PM
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Originally posted by midgetstar
there IS a difference and scientist know it
[edit on 10-6-2005 by midgetstar]


Handy Neighborhood scientist here!

Light and EM radiation travels at the speed of light, ALWAYS. However, when passing through a medium photons are absorbed by the electrons or positrons of the matter and kicked to a higher energy shell that then decay and give off a new photon with a similiar frequency. The time it takes for this to occur is based on the time it takes the electron/positron to quantum tunnel between energy states.

Light never goes less than C, it just takes some things longer to transmit the data of that light creating the effect that it takes longer.

Please do not confuse public school science or media science with real science.



posted on Jun, 10 2005 @ 01:21 PM
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**cough cough** two posts up **cough cough**




posted on Jun, 10 2005 @ 01:31 PM
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here are two other constants that mix well with c .

the other two are the electric permittivity of free space and the magnetic permeability of free space, . The magnetic permeability of free space is taken to have the exact value



and then the electric permittivity takes the value given by the relationship


In the presence of polarizable or magnetic media, the effective constants will have different values. In the case of a polarizable medium, called a dielectric, the comparison is stated as a relative permittivity or a dielectric constant. In the case of magnetic media, the relative permeability may be stated.









posted on Jun, 10 2005 @ 02:50 PM
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Originally posted by Quest

Originally posted by midgetstar
there IS a difference and scientist know it
[edit on 10-6-2005 by midgetstar]




positrons of the matter and kicked to a higher energy shell that then decay and give off a new photon with a similiar frequency

Please do not confuse public school science or media science with real science.



good goin... there are no positrons in matter, that would be anti-matter,

anyway, microwaves do travel at the speed of light yes, but they do not

stimulate the creation of new photons from the electrons into which they

are absorbes, they only cause friction and create heat. gamma rays on the

other hand hit the electrons hard enough to ionize the atom... but thats off

subject. now, about the whole "school scence" and "real science" thing. i

don't know what you consider to be "real science", but i am willing to bet

that u didn't visit the site i gave u.

and oh yeah, u also said light and EM radiation... is light not EM radiation?

[edit on 10-6-2005 by midgetstar]



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