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8. oldal
In 1832 Sir D. Brewster dis- covered a third kind of spectrum ; for trying what effect would be produced by viewing sunlight through the thick vapour of nitrous gas , he found that a number of new dark lines appeared in the solar ...
In 1832 Sir D. Brewster dis- covered a third kind of spectrum ; for trying what effect would be produced by viewing sunlight through the thick vapour of nitrous gas , he found that a number of new dark lines appeared in the solar ...
9. oldal
cause of those two dark lines , he went on to try to account for others by the application of the new principle ; but instead of so simple a spectrum as that of sodium , he took that of iron , which contains several hundred lines .
cause of those two dark lines , he went on to try to account for others by the application of the new principle ; but instead of so simple a spectrum as that of sodium , he took that of iron , which contains several hundred lines .
10. oldal
the level of the photosphere which gives the continuous spectrum . Or it may be , and it actually is so in one instance , at so high a temperature as to give out as much light as it absorbs , and so give no sign of its presence .
the level of the photosphere which gives the continuous spectrum . Or it may be , and it actually is so in one instance , at so high a temperature as to give out as much light as it absorbs , and so give no sign of its presence .
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Tartalomjegyzék
The Music of the Year 1877 | 177 |
English Philanthropy in 1877 | 192 |
Table of all the Public General Acts of Parliament for 1877 | 201 |
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