Well, alaniesse is presumptuous, making a nice salad, talking about what he does not know at all:
alaniesse wrote:No Elephant, not presumptuous.
just what I feel, from what I saw.
We know that hydrogen has a wavelength of 20 cm.
It revolves around that.
I'm sure it's simple.
while this 21cm line, especially observed in hydrogen astronomy, only exists with monoatomic hydrogen in a good space vacuum, isolated far from other atoms, a single electron rotating around the proton nucleus:
http://fr.wikipedia.org/wiki/Raie_%C3%A ... %C3%A8treshttp://en.wikipedia.org/wiki/Hydrogen_lineIn H2O water, or in biatomic H2, this is impossible, there is no 21cm line, the atoms are too close to each other:
In the case where hydrogen is in its molecular form, denoted H2, where two hydrogen atoms are linked by electronic clouds (they lend each other their electrons), the two sub-levels are permanently filled. In this case no atomic transition is possible because the laws of quantum mechanics prohibit 2 electrons from being on the same sub-level. This is the Pauli Exclusion Principle.
Meyer and those speaking make incredible salads with experimental scientific knowledge that destroys any confidence in the validity of Meyer's craft.
They make a salad mixing all kinds of very different resonance;
mechanical already numerous around the Khz and audible with our ears
electromagnetic LC frequencies between KHz to hundreds of megaHetz, according to C and L
the monoatomic hyperfine line of H at 21.10611405413 cm in the quality vacuum of dissociated H
This ray was first served in the sky, and observed on earth in a vacuum, only after !!
During the 1930s, it was noticed that there was a radio 'hiss' that varied on a daily cycle and appeared to be extraterrestrial in origin. After initial suggestions that this was due to the Sun, it was observed that the radio waves seemed to be coming from the center of the Galaxy. These discoveries were published in 1940 and were seen by Professor JH Oort who knew that significant advances could be made in astronomy if there were emission lines in the radio part of the spectrum. He referred this to Dr Hendrik van de Hulst who, in 1944, predicted that neutral hydrogen could produce radiation at a frequency of 1420.4058 MHz due to two closely spaced energy levels in the ground state of the hydrogen atom.
The 21 cm line (1420.4 MHz) was first detected in 1951 by Ewen and Purcell at Harvard University, [2] and published after their data was corroborated by Dutch astronomers Muller and Oort, [3] and by Christiansen and Hindman in Australia. After 1952 the first maps of the neutral hydrogen in the Galaxy were made and revealed, for the first time, the spiral structure of the Milky Way.