The Spectroscope and Its Applications |
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Page 6
... or in fact any transparent surface , the greater will be the pro- portion of light reflected at its surface . Refraction may be clearly studied by plunging a stick into a vessel of water : the stick will 6 [ LECT . THE SPECTROSCOPE.
... or in fact any transparent surface , the greater will be the pro- portion of light reflected at its surface . Refraction may be clearly studied by plunging a stick into a vessel of water : the stick will 6 [ LECT . THE SPECTROSCOPE.
Page 7
... clearly seen by passing a ray of light into a vessel , containing a liquid such as bisulphide of carbon , with a layer of water floating on the top . The ray will be seen to be bent on entering the water , and still more bent on passing ...
... clearly seen by passing a ray of light into a vessel , containing a liquid such as bisulphide of carbon , with a layer of water floating on the top . The ray will be seen to be bent on entering the water , and still more bent on passing ...
Page 16
... clearly as it might do . Now I am very anxious that you should see that this is really an effect due to the flowing in of light from different parts of that wheel into the eye , and so forming this compound impression , which is ...
... clearly as it might do . Now I am very anxious that you should see that this is really an effect due to the flowing in of light from different parts of that wheel into the eye , and so forming this compound impression , which is ...
Page 17
... clear , the yellow light only allowing a difference to be seen of more or less depth of shade - there being no difference in colour . But when we allow the polychromatic light from the lamp , or as we get it from the sun , to shine upon ...
... clear , the yellow light only allowing a difference to be seen of more or less depth of shade - there being no difference in colour . But when we allow the polychromatic light from the lamp , or as we get it from the sun , to shine upon ...
Page 22
... clear that the spectroscope , if it does its duty well , will give you blackness where the yellow light is absent . We do not find that the whole of any particular colour is absent , but here and there , scattered over all the colours ...
... clear that the spectroscope , if it does its duty well , will give you blackness where the yellow light is absent . We do not find that the whole of any particular colour is absent , but here and there , scattered over all the colours ...
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Common terms and phrases
absorption lines absorption spectrum Aldebaran application arrangement astronomers atmosphere band black lines blue bright lines Bunsen chromosphere coincident collimating lens colour comet continuous spectrum dark lines deal dense determine direct-vision dispersion electric lamp examine experiment F line fact flame Fraunhofer lines gas or vapour gaseous gases give glass green Huggins hydrogen lines important Induction Coils instance instrument iron Kirchhoff lens line of hydrogen lithium magnesium vapour metal minimum deviation nebula Newton NORMAN LOCKYER number of prisms observing telescope obtained Orionis pass perfectly easy pressure Professor prominences radiation rainbow band ray of light refracted refrangibility Science scientific seen showing shown in Fig slit sodium lines sodium vapour solar prominences solar spectrum solid or liquid spec spectra spectrum analysis Spectrum of carbon star spectroscope strontium substances sun-spot sunlight surface thing three prisms trum tube velocity violet visible white light Wollaston yellow
Popular passages
Page 96 - When this light was allowed to fall through a suitable flame coloured by common salt, dark lines were seen in the spectrum in the position of the sodium lines.
Page 94 - I obtained a tolerably bright solar spectrum, and brought a flame coloured by sodium vapour in front of the slit. I then saw the dark lines D change into bright ones.