How did the speed of the

Page 1 of 6 Early Methamphetamine First synthesized in Germany, amphetamine was for a long time, a drug in search of a disease.

How did the speed of the

How is that possible, and if true, what are the general implications for our understanding of the basic scientific principles we live by now? The article was in yahoo's science news section sometime last week. Close as I can get, sorry. It seems like the article you read was only one of many which reviewed a paper sent to the journal Nature this month.

The article in Nature talks about the possibility of the speed of light changing over the history of the universe. Where this stems from is observational evidence that the "fine structure constant" has changed. The fine structure constant determines the exact wavelength of fine structure lines in the spectra of atoms, and measurements of the spectra of quasars suggest that it many have decreased by 0.

The authors of the paper argue that since the fine structure constant is equal to the charge on an electron squared divided by Planck's constant times c speed of lightthen for the fine structure constant to change one of these must also change.

They go on to provide an arguement as to why they think it must be the speed of light, and that's what caught the eyes of the popular press. However this article out today on the LANL preprint server argues why dimensionful constants like c cannot change, since we can just define them to be whatever we want by changing units.

For example if we define units in which the speed of light and Planck's constant are both exactly equal to one which is commonly done in theoretical Physicsthen the fine structure constant is just equal to the charge on an electron squared, and the question has no meaning.

Since then more debate has followed and no consensus has been reached yet by scientists. It's very interesting though. You can read more about some of the implications in this answer. This page was last updated June 27, What Einstein did was to take seriously the implications of Maxwell’s theory, namely that the vacuum speed of light is not dependent on the velocity of the person observing it.

This invariance of the vacuum speed of light is the fundamental postulate of the special theory of relativity. Light travels at an incomprehensible speed of , km/s or ,,28, km/hr.

Michelson–Morley experiment - Wikipedia

A Maglev travels at around % of the speed of light. I’m not even exaggerating or using a gaudy, inflated adjective to describe its magnitude. The speed is literally incomprehensible. Our mental faculty isn’t equipped to assess objects moving SO swiftly.

Speed (methamphetamine, C 10 H 15 N) is a potent and addictive central nervous system stimulant, chemically related to amphetamine, but with greater central nervous system side effects. It is a white, odorless, bitter-tasting powder that easily dissolves in water or alcohol.

How did the speed of the

Methamphetamine is. Jun 10,  · Watch video · 'Speed' has to be the ultimate action film, involving you in an intense experience from the opening credits until the smash-bang climax.

Early Ideas about Light Propagation

Not only do Keanu Reeves and Sandra Bullock do top work, but Dennis Hopper makes the most compelling villain of the '90s/10(K). Speed is a defunct sports-oriented cable and satellite television network that was owned by the Fox Sports Media Group division of 21st Century Fox.

The network was dedicated to motorsports programming, including auto racing, as well as automotive-focused programs. The article in Nature talks about the possibility of the speed of light changing over the history of the universe.

Where this stems from is observational evidence that the "fine structure constant" has changed.

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