Fundamental Universal Costants

In summary, the conversation discusses the fundamental universal constants, specifically those that are not obtainable from others. It is mentioned that the light speed c is not considered fundamental in all systems of units and that some constants that are currently fundamental may not be in the future. The conversation also mentions that μ0 and ε0 have defined values currently, and provides a resource for more information on physical constants.
  • #1
w.shockley
21
0
Which are the Fundamental Universal Costants?
With "Fundamental" i mean the ones that are not obtainable from others:
for example, the light speed c is not fundamental, because is 1/sqrt(epsilon0 mu0)...
 
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  • #2
It depends on which system of units you are using.
Some of the constants that are now fundamental will probably NOT be fundamental and vice versa once the SI is updated in a few years time.
And c IS fundamental in the SI, whereas epsilon_0 is not.
 
  • #3
Hi w.shockley! Welcome to PF! :smile:

Actually, all the constants you mention have defined values nowadays.
μ0 has always been a mathematical constant (afaik).
c has been defined as a specific constant.
And in turn ε0 has become a defined constant as well.

For more information, see for instance: http://en.wikipedia.org/wiki/Physical_constant
 

1. What are fundamental universal constants?

Fundamental universal constants are physical quantities that are believed to be constant throughout the universe and are essential for understanding the laws of physics. These constants play a crucial role in various scientific theories and calculations.

2. How many fundamental universal constants are there?

There are currently 26 known fundamental universal constants, although some theories suggest that there may be more. These constants include well-known quantities such as the speed of light and the gravitational constant.

3. Are fundamental universal constants truly constant?

While these constants are believed to be constant, there is ongoing research and debate on the possibility of their variability over time or in different regions of the universe. However, there is currently no conclusive evidence to support this idea.

4. How are fundamental universal constants determined?

Fundamental universal constants are determined through precise measurements and experiments. Scientists use a variety of techniques and tools, such as particle accelerators and telescopes, to measure these constants and refine their values.

5. Can fundamental universal constants change?

As mentioned before, there is ongoing research and debate on the possibility of the variability of these constants. While there is no conclusive evidence to support this idea, it is not completely ruled out. Further research and advancements in technology may provide more insights into the nature of these constants.

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