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Comment: Re:what? (Score 1) 52

by HiThere (#49764293) Attached to: Universe's Dark Ages May Not Be Invisible After All

Higher energy photons are distinct from lower energy photons in having a shorter wavelength. They both travel at (about) the same speed. Presumably in a true vacum they would travel at exactly the same speed.

Thus blue light is more energetic than red light, and has a shorter wave length. You measure the energy of the photons by absorbing a certain number and measuring the change in velocity or temperature of the thing that absorbed them. (Usually this is done by some sort of photocell arrangement were the absorbtion translates into electron volts, and that's what you actually measure. I believe that this has been done down to the single photon level, but I'm not sure.)

Comment: Re:Sudden? (Score 1) 263

by HiThere (#49759627) Attached to: ESA Satellite Shows Sudden Ice Loss In Southern Antarctic Peninsula

Money is not equivalent to free speech, no matter how you twist things. I do not accept your arguments.

It is worth noting that one of the arguments which I read to be against the "free press" is the statement "The power of the press belongs to the man who owns one.". I don't fee this is sufficient grounds to be against freedom of the press, but it certainly highlights the limitations on its desirability. It's a way that only empowers the wealthy, as opposed to free speech which is available to the eloquent, whether rich or poor. And that highlights a limitation on the desirability of free speech. But the constitution made the best of things, but requiring *both* free speech and the free press. It would be reasonable to equate money with the free press, but not with free speech.

There's no such thing as a free lunch. -- Milton Friendman