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On the Determination of the Mean Horizontal Intensity of Incandescent Lamps ...
Edward P. Hyde
No preview available - 2017
16 double 180 revolutions anchored filament lamp angle of incidence angle POO axis of rotation bad flickers candlepower scale candlepower values change in mean coefficient of reflection comparison lamp computed decrease the mean different types direct light double flattened due to bending due to flicker effect of bending effect of flicker eliminate flicker equation error due error of observation excessive drooping horizontal distribution curve horizontal intensity due incandescent lamps increase investigation lamp at 180 lamp rotating lamps studied large errors Liebenthal maxima Mean Horizontal Candlepower mean horizontal intensity Measurement of Mean mirrors rotating obtained oval anchored filament photometer screen photometric axis possible errors range of candlepower reaching the photometer revolutions per minute rotating at 180 rotating the lamp single mirror speed of 180 speed to eliminate substitution method sufficiently high speed Talbot's law tantalum lamp tions per minute touched the bulb type of filament types of lamps