Difference between hydrogen lines and molecular lines?

Trying to do a question about the Harvard classification scheme.

Update:

Question asks for strongest molecular lines and then hydrogen lines, what is the difference?

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  • ExTex
    Lv 5
    8 years ago
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    I cannot tell you what are the strongest molecular lines, but I can tell you what the main difference

    between the two types of spectra are.

    Hydorgen atoms do not bond very strongly together to form hydrogen molecules Two hydrogen atoms bond to make one molecule. So in the high temperatures of stars and the sun, there is very little molecular hydrogen because the molecules would be torn apart from thermal collisions. Other types of atoms present in stars and the sun have atoms that bond strongly enough together for there to be significant amounts of their molecules present. I believe that carbon and calcium are often present as molecules at significant enough amounts in the composition of stars to affect their spectra.

    The emission and abssorption spectra of atoms and of molecules are essentially the same as to their patterns of lines for the same type of atom or molecule, but emission spectra have bright lines, and absorption spectra have dark lines that show up on an overall bright background of light. I believe that most stars have stronger absorption spectra than emission spectra.

    Hydrogen atoms have the simplest and least complicated spectral patterns of lines of almost any of the elemental atoms, and the molecules of elements present in stars have much richer and more complicated spectra than do individual atoms, and especially than do hydrogen atoms.

    Since stars vary greatly in their composition in terms of what elements are present and how many relative to other elements, plus what percentage are atoms and what percentage are molecules, the stars can be classified into categories of which stars are alike and which are very different by the spectral lines coming from those stars. The differences in temperature, pressure, and other physical factors also produce characteristic differences for different types of stars. Because of the complexity of the spectral patterns of stars, it is very difficult and complicated to sort out the differences in those of different stars and relate their patterns to the atoms and molecules present in any star and to what the patterns tell astronomers about the physical characteristics of a star.

    Classification schemes like the Harvard one are designed and used in helping try to interpret the differences in stars that are indicated by the differences in their spectra.

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  • 3 years ago

    that is extremely a controversial philosophical topic. Are viruses alive? you're taught that residing issues ought to breed, which those do, yet they could't exist as loose-residing. yet they seem to be a complicated, evolving inhabitants of creatures. Do they stay? only to characteristic yet another element, the way issues are going--shall we nicely be able to three day describe to minute element even the complicated relays and purposes interior the mind that supply upward push to expertise; in which case it would want to all be a very complicated, yet ultimately inorganic relay which may be defined completely using the chemistry of molecules and atoms. If what makes humankind tick is composed in user-friendly words of many small inorganic reactions, does this propose that we are not alive? Are we only the ultimately complicated chemical reaction? the position you draw the line relies upon on what your definition is. If the idea is going to be on complexity, then you actual favor to go back to a call on a threshold. Cells are complicated, certain, yet some are not loose residing and may't mirror. Are they 'alive' in and of themselves? in case you flow by technique of the 'traits' of a residing organism, then you actual're reducing out viruses, and also you may't evaluate some sorts of cells interior the body as residing both. in the intervening time in case you flow by technique of complexity of relays, then you actual're being thoroughly subjective in the position you reduce that off.

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