The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 240
... line of sight have been determined for many stars from the Doppler effect , which shifts all lines by an amount proportional to wavelength . To make such a determination , a spectrum of medium to high disper- sion is taken , with a ...
... line of sight have been determined for many stars from the Doppler effect , which shifts all lines by an amount proportional to wavelength . To make such a determination , a spectrum of medium to high disper- sion is taken , with a ...
Page 243
... lines of Hydrogen , due to recombination , and the forbidden lines of ionized oxygen , sulfur and neon , due to electron impact . By courtesy of Hale Observatories ; from C. Payne - Gapocshkin and K. L. Haramundanis , Introduction to ...
... lines of Hydrogen , due to recombination , and the forbidden lines of ionized oxygen , sulfur and neon , due to electron impact . By courtesy of Hale Observatories ; from C. Payne - Gapocshkin and K. L. Haramundanis , Introduction to ...
Page 245
... line , is emitted in a transition from n = 2 to n = 1 ; Balmer alpha , or hydrogen alpha ( Ha ) , in the red , is the 3-2 transition . These lines belong to well - known hydrogen series of lines named after prominent physicists . Radio ...
... line , is emitted in a transition from n = 2 to n = 1 ; Balmer alpha , or hydrogen alpha ( Ha ) , in the red , is the 3-2 transition . These lines belong to well - known hydrogen series of lines named after prominent physicists . Radio ...
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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