Illuminating Engineering Practice: Lectures on Illuminating Engineering Delivered at the University of Pennsylvania, Philadelphia, September 20 to 28, 1916McGraw-Hill Book Company, Incorporated, 1917 - 578 halaman |
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Halaman 83
... tion of resources demands generally so small an amount of illumina- tion that the preservation of suitable dark adaptation in the eye becomes of paramount importance . Only now and then is high intensity desirable and that only locally ...
... tion of resources demands generally so small an amount of illumina- tion that the preservation of suitable dark adaptation in the eye becomes of paramount importance . Only now and then is high intensity desirable and that only locally ...
Halaman 249
... tion are used for the projection of lantern slides under all condi- tions , and take care of the requirements amply . Recently the gas- filled tungsten - filament lamps have also been successfully applied Condenser Objective Light ...
... tion are used for the projection of lantern slides under all condi- tions , and take care of the requirements amply . Recently the gas- filled tungsten - filament lamps have also been successfully applied Condenser Objective Light ...
Halaman 428
... tion represented by the curves , there are presented solids of revolu- tion of the candle - power distribution curves for three of the charac- teristics selected . These solids ( Fig . 7 ) therefore represent the mean distribution of ...
... tion represented by the curves , there are presented solids of revolu- tion of the candle - power distribution curves for three of the charac- teristics selected . These solids ( Fig . 7 ) therefore represent the mean distribution of ...
Isi
The Principles of Exterior Illumination | 77 |
Modern Photometry | 99 |
Recent Developments in Electric Lighting Appliances | 131 |
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ILLUMINATING ENGINEERING PRAC University of Pennsylvania,Illuminating Engineering Society Pratinjau tidak tersedia - 2016 |
Istilah dan frasa umum
accessories amount angle appearance artificial light artistic average beam bowl bowl type brightness candle candle-power distribution carbon ceiling cent church classification yard color cost curve dark daylight decorative density desirable diffusing globe direct lighting distance effect efficiency Elec electric electrodes enclosed equipment factor filament fixtures floor foot-candles gas mantle gas-filled give glare glass glassware height horizontal important incandescent lamps indirect installation integrating sphere intensity interior lecture light flux light sources lighting units lumens luminous luminous arc luminous flux Magnetite mantle Mazda measure method mirror obtained opal operation outer globe photometer photometry placed plane practical prismatic problem produce proper reflection reflection coefficient reflectors refractor screen screw shades shadows solid angle space sphere spherical square standard street lighting surface source tion Trans tungsten lamps uniform usually vertical vision VOLT walls watt window