SETI@home už počíta aj na Nvidia GPU, 5x - 10x rýchlejšie
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Re: rozpravka o žiarení
Od: SN1987A
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Pridané:
2009-05-31 16:31:56
WIKI: (keyword Hydrogen line)
The hydrogen line, 21 centimeter line or HI line refers to the spectral line created by the solar system energy state of neutral hydrogen and occurs at a frequency of 1420.40575 MHz, equivalent to a vacuum wavelength of around 21 cm. This line falls within the microwave region of the electromagnetic spectrum and is used extensively in astronomy, since it can penetrate dust clouds that are opaque to visible wavelengths. The radiation comprising the hydrogen line comes from the transition between the two hyperfine levels of the hydrogen 1s ground state.
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