The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 233
... light is passed through a narrow slit ; in a spectroscope , the series of coloured images of the slit are focussed in orderly array . The best known natural line that is produced in interstellar space by hydrogen atoms is in the radio ...
... light is passed through a narrow slit ; in a spectroscope , the series of coloured images of the slit are focussed in orderly array . The best known natural line that is produced in interstellar space by hydrogen atoms is in the radio ...
Page 236
... light beam from any available grating . In small sizes , semisolid cameras , in which the photographic film is pressed against the glass of the mirror system , can be as fast as f / 0.35 . The limits of faintness that can be re- corded ...
... light beam from any available grating . In small sizes , semisolid cameras , in which the photographic film is pressed against the glass of the mirror system , can be as fast as f / 0.35 . The limits of faintness that can be re- corded ...
Page 1029
... light . ( Top right ) Luminous fish Photoblepharon palpebratus ( above ) and Anomalops katopteron ( below ) showing large light organs beneath the eye . ( Centre left ) Stab culture of symbiotic luminous bacteria cultivated from a ...
... light . ( Top right ) Luminous fish Photoblepharon palpebratus ( above ) and Anomalops katopteron ( below ) showing large light organs beneath the eye . ( Centre left ) Stab culture of symbiotic luminous bacteria cultivated from a ...
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aesthetic ancient appear areas arms artists aschelminths Asia Asian associated atmosphere atoms become body called Central centre century changes China continued countries criticism culture early Earth East economic effect electrons elements energy example exist field forces France function Games groups head human important increase India individual industrial influence Italy Japan known later less light lines living lower major mass means ment metres military mountain nature North objects observations occur organization original painting particular percent period physical Pleistocene political population position possible practice present produced radiation range region relatively remains represent result schools social society sometimes sources South Soviet species stars structure style surface temperature theory tion traditional types United usually various West western