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Post by abacus9900 on Feb 16, 2011 18:32:11 GMT 1
What are atomic emission spectra?
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Post by helen on Feb 16, 2011 21:52:33 GMT 1
I can explain this but it involves maths and abstract concepts. Are you going to have a problem with this?
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Post by abacus9900 on Feb 16, 2011 22:01:21 GMT 1
I can explain this but it involves maths and abstract concepts. Are you going to have a problem with this? Yes, I'm far too dim to deal with maths and abstract concepts. Can you use kiddie language please?
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Post by helen on Feb 16, 2011 22:03:13 GMT 1
No
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Post by abacus9900 on Feb 16, 2011 22:16:05 GMT 1
Some teacher you are, Helen.
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Post by speakertoanimals on Feb 16, 2011 22:26:44 GMT 1
When stuff gets hot, it gives out lots of pretty coloured light. The exact colour depends on the atoms it is made of.
If you don't know what atoms are, go ask an adult......................
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Post by abacus9900 on Feb 16, 2011 22:30:41 GMT 1
When stuff gets hot, it gives out lots of pretty coloured light. The exact colour depends on the atoms it is made of. If you don't know what atoms are, go ask an adult...................... Now that wasn't so hard was it? See, I can now ask the question: what atoms give off what light? (Top down, remember? Always allow an opportunity for the student to ask more questions - that is effective learning.)
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Post by speakertoanimals on Feb 16, 2011 22:49:50 GMT 1
Which is a stupid question (as you well know), and given that we have a hundred-odd to choose from, and that each has a whole set of spectral lines, going to be a LONG answer if anyone attempts to answer.
Actually, its a total stamp-collecting question. Boring in the extreme.
Whereas a proper and insightful question would be -- WHY discrete spectral lines, and here we come quantum theory.................
But no, we just get daft one-line requests that could be answered by someone looking in a text-book or on Wikipedia.
Sounds like more bollocks to me......................
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Post by abacus9900 on Feb 16, 2011 23:00:34 GMT 1
Which is a stupid question (as you well know), and given that we have a hundred-odd to choose from, and that each has a whole set of spectral lines, going to be a LONG answer if anyone attempts to answer. Actually, its a total stamp-collecting question. Boring in the extreme. Whereas a proper and insightful question would be -- WHY discrete spectral lines, and here we come quantum theory................. But no, we just get daft one-line requests that could be answered by someone looking in a text-book or on Wikipedia. Sounds like more bollocks to me...................... NO NO NO NO NO! Look, you have to expect naive questions from a student so what you do is to explain (nicely) that there are very many kinds of spectral lines and then go on to explain what spectral lines are. You really are not too good at this are you? What you do NOT do is attack your student!! Got it?
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Post by speakertoanimals on Feb 16, 2011 23:04:11 GMT 1
I'm not attacking my student O countless one, I'm attacking you for a continued sequence of pointless posts where you pretend to be even thicker than you actually are (which, I have to say, is your one truly impressive achievement to date!).
Except even the thick kid at the back has some vague idea that there are quite a few different sorts of stuff, so even he would have asked something a bit more insightful than this.....................
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Post by abacus9900 on Feb 16, 2011 23:10:46 GMT 1
I was right STA, you are a psycho and God forbid I ever meet you.
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Post by Progenitor A on Feb 17, 2011 9:27:29 GMT 1
I was right STA, you are a psycho and God forbid I ever meet you. You keep repeating your mistake out of good manners Abacus! This thread is a disgrace A valid science question is asked and we get a brush-off from one whose area of expertise this is and the normal tirade of abuse from the disturbed member Not just atomic emission but also atomic absorption spectral lines are important Well, I vaguely remeber looking at atomic spectral lines during my degree course You need an incandescent source with known chemical properties and a diffraction grating and display screen The diffraction grating spreads the light according to its frequency, and than a display of the spread spectrum can be examined. Some of the spectral liines correspond to atoms in the source, dark spectral lines show atoms of a particular type absorbing energy at a specific frequency and bright lines might indicate atoms excited and emitting energy at a specific frequency. Helium is, I believe, used as a marker - this appears as a dark line where helium atoms absorb energy at a perticular frequency. I belive that the shift in 'frequency' (it is not really the frequency that is shifted but the wavelength)of the helium spectral line toward the red end of the colour spectrum is evidence of a regressing universe I found it fascinating but cannot recall if I am getting the details right.
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Post by abacus9900 on Feb 17, 2011 10:33:10 GMT 1
I was right STA, you are a psycho and God forbid I ever meet you. You keep repeating your mistake out of good manners Abacus! This thread is a disgrace A valid science question is asked and we get a brush-off from one whose area of expertise this is and the normal tirade of abuse from the disturbed member Not just atomic emission but also atomic absorption spectral lines are important Well, I vaguely remeber looking at atomic spectral lines during my degree course You need an incandescent source with known chemical properties and a diffraction grating and display screen The diffraction grating spreads the light according to its frequency, and than a display of the spread spectrum can be examined. Some of the spectral liines correspond to atoms in the source, dark spectral lines show atoms of a particular type absorbing energy at a specific frequency and bright lines might indicate atoms excited and emitting energy at a specific frequency. Helium is, I believe, used as a marker - this appears as a dark line where helium atoms absorb energy at a perticular frequency. I belive that the shift in 'frequency' (it is not really the frequency that is shifted but the wavelength)of the helium spectral line toward the red end of the colour spectrum is evidence of a regressing universe I found it fascinating but cannot recall if I am getting the details right. Thank you naymissus, that's all I wanted - a decent reply. What's the matter with people on here? It's not normal.
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Post by speakertoanimals on Feb 17, 2011 17:15:51 GMT 1
Except that reply DOESN'T state what they are, or WHY they are important, it describes how you MEASURE them.
Critically important point -- atoms of a certain element are found to only emit certain wavelengths of light. Doesn't depend on the chemical state of the atoms, just that it is (say) a sodium atom.
And different element, different colours.
Hence discrete electron energy levels and quantum theory..............
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Post by Progenitor A on Feb 17, 2011 17:28:59 GMT 1
Notice, Abacus, how the disturbed one scoffs at your questions yet cannot resits jumping in if other attempt to answer them
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