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→Zircon Dating
::::About the speed of light, it could actually double and increase and decrease and we wouldn't observe any change in anything whatsoever. Everything is based on the speed of light- the meter is just directly based on it. You can't really even say that the speed of light is increasing or decreasing unless every other physical constant is somehow held in place while this is happening.
::::About the speed of light, it could actually double and increase and decrease and we wouldn't observe any change in anything whatsoever. Everything is based on the speed of light- the meter is just directly based on it. You can't really even say that the speed of light is increasing or decreasing unless every other physical constant is somehow held in place while this is happening.
::::This is actually what I love about physics. There are some things we can be sure of because they are theory. The speed of light is DEFINED to be exactly 299,792,458 meters per second. The speed of light is one of three of the most important constants we use when discussing radiation, the other two being the magnetic constant ''μ''<sub>0</sub>, which is measured in kg ms<sup>-2</sup>A<sup>-2</sup> and the electric constant and the electric constant ''ε''<sub>0</sub>, which is defined in A<sup>2</sup>s<sup>4</sup>kg<sup>-1</sup>m<sup>-3</sup>. These three constants rely on each other for the definitions of their units. I've measured ''c'' and ''μ''<sub>0</sub> myself, which made measuring ''ε''<sub>0</sub> unnecessary.
::::This is actually what I love about physics. There are some things we can be sure of because they are theoretical. The speed of light is DEFINED to be exactly 299,792,458 meters per second. The speed of light is one of three of the most important constants we use when discussing radiation, the other two being the magnetic constant ''μ''<sub>0</sub>, which is measured in kg ms<sup>-2</sup>A<sup>-2</sup> and the electric constant and the electric constant ''ε''<sub>0</sub>, which is defined in A<sup>2</sup>s<sup>4</sup>kg<sup>-1</sup>m<sup>-3</sup>. These three constants rely on each other for the definitions of their units. I've measured ''c'' and ''μ''<sub>0</sub> myself, which made measuring ''ε''<sub>0</sub> unnecessary.
::::Anyway, it's pretty clear to me that while the guy who proposed that the speed of light was once much faster in the past is technically correct (and incorrect at the same time), he doesn't really understand what this means. It would be the same thing as me giving a lecture on quantum mechanics. I don't understand that yet so I have no business acting like I do. --[[User:MichaelK|MichaelK]] 17:54, 12 May 2008 (EDT)
::::Anyway, it's pretty clear to me that while the guy who proposed that the speed of light was once much faster in the past is technically correct (and incorrect at the same time), he doesn't really understand what this means. It would be the same thing as me giving a lecture on quantum mechanics. I don't understand that yet so I have no business acting like I do. --[[User:MichaelK|MichaelK]] 17:54, 12 May 2008 (EDT)