The Observatory, Volume 56Editors of the Observatory, 1933 Some vols. for 1886- include a special issue: Annual companion to the Observatory. |
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Page 292
... frequency interval between the maximum of ( v ) ( the centre of the line ) and that frequency for which κ ( v ) has half this value . This half - width is therefore identical with the measured width of the spectral line only in the case ...
... frequency interval between the maximum of ( v ) ( the centre of the line ) and that frequency for which κ ( v ) has half this value . This half - width is therefore identical with the measured width of the spectral line only in the case ...
Page 294
... frequency of the light lies between v and v + dv , and the radiation density in this frequency interval is p ( v ) dv . The oscillator will then execute forced oscillations of the same frequency as the incident light . The energy W ( v ) ...
... frequency of the light lies between v and v + dv , and the radiation density in this frequency interval is p ( v ) dv . The oscillator will then execute forced oscillations of the same frequency as the incident light . The energy W ( v ) ...
Page 295
... frequency as the incident light , since the latter causes forced oscillations of its own frequency . The quantity of energy re - emitted is given exactly by ( 5 ) , as it appears only in the form of light . If the incident light ...
... frequency as the incident light , since the latter causes forced oscillations of its own frequency . The quantity of energy re - emitted is given exactly by ( 5 ) , as it appears only in the form of light . If the incident light ...
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absorption appears astrographic Astronomer Royal atmosphere atom bands bright BRITISH ASTRONOMICAL ASSOCIATION calcium Cambridge Cape catalogue central intensities centre chromosphere clock colour comet comparison stars computed correction corresponding craters Crommelin curve Decl density determined discussion distance double stars Earth eclipse effect electrons emission ephemeris equation equatorial Eros frequency galaxies George Darwin give given Greaves Greenwich hydrogen instrument interest investigation ionisation Jupiter km./sec latitude layer light lines longitude magnetic magnitude mean measured meridian meteorite meteors method motion nebulæ observations Observatory obtained orbit oscillator paper period photographs planet planetary plates position possible present President probable error Prof Professor Quadrantids radial velocities radiation Right Ascension rotational speed Sir Arthur Eddington Sir Frank Dyson slide Solar Activity spectra spectrograph spectrum spot Steavenson stellar Sun's sunspot surface tables telescope temperature theory University variable variable stars variation wave-length zero