Saturday, June 23, 2007

Oh Goodness, not C-decay

PZ Myers recently linked to an article in the World Net Daily (a less than credible source for just about anything) which tries to hold that the speed of light in a vacuum (c) was faster in the past than it is now. Now, talk.origins does a pretty good job of dismantling the technical parts of it, and the lousy science behind it, but I (independently) found another way in which a decrease in the speed of light in a vacuum (c) would violate another law of physics, one creationists hold quite dear to them. However, it's kind of a logical proof rather than experimental, and rather simple, but very effective in my opinion:

Lets take a certain moment in time where c is at any value. It doesn't really matter, and call it c*. So, following Einstein's E=mc^2, the amount of energy that universe contains in mass would be E=m(c*)^2, where m is the mass of everything in the universe. Get me so far?

Now, lets assume some amount of time has passed, and the speed of light in a vacuum is ct. According to c-decay, (ct)^2 < (c*)^2. Since m is constant in the universe, then Et < E*. However, this cannot be, because it breaks the law of conservation of (mass &) energy. The amount of mass stayed the same in the universe, but the amount of energy inherent in the mass decreases; therefore, law of conservation of energy is broken.

This kinda sucks for Young Earth Creationists because they often use the law of conservation of energy to justify a creator, because, according to them, the universe can't create itself. Well, here's a nice theoretical obstacle for ya. Enjoy!

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