. Electronic apparatus for biological research . c .Q « QC SIOOO 15P00 Wavelength Figure Comparison between the spectral distribution of the emission from an ideal black body and a tungsten surface, both at 2,870°K TABLE 2 Colour Temperatures of Common Sources—from Spencer^ Light source Colour temperature (°K) Candle 1,900 Carbon filament lamp 2,080 Tungsten filament lamps 20 W 2,600 40 2,755 100 2,835 200 2,880 500 2,935 750 2,955 1,000 3,000 1,500 3,020 Photopearl lamp 3,100 Projection lamp, 500 W 3,190 () 3,200°K lamps PS. 25 3,200 () Photoflash 3,300
. Electronic apparatus for biological research . c .Q « QC SIOOO 15P00 Wavelength Figure Comparison between the spectral distribution of the emission from an ideal black body and a tungsten surface, both at 2,870°K TABLE 2 Colour Temperatures of Common Sources—from Spencer^ Light source Colour temperature (°K) Candle 1,900 Carbon filament lamp 2,080 Tungsten filament lamps 20 W 2,600 40 2,755 100 2,835 200 2,880 500 2,935 750 2,955 1,000 3,000 1,500 3,020 Photopearl lamp 3,100 Projection lamp, 500 W 3,190 () 3,200°K lamps PS. 25 3,200 () Photoflash 3,300 or Photoflood lamps Nos. 1 and 2 3,325 () lamps 3,350 Mazda photoflood lamps Nos. 1, 2, and 4 3,425 () Clear Photoflash 3,800 Sashalite 3,500-4,000 Daylight (blue) Photofloods () 4,800 White flame carbon arc 5,000 Direct sunlight—early or late in day or winter 5,000 Sun's rays at sunset 2,000-4,000 Average noon sunlight 5,400 High intensity sun arc 5,500 Hazy sunlight, slightly overcast sky 5,800 () Blue Photoflash 6,000 Sunlight plus light from clear sky at noon 6,500 Totally overcast sky 6,800 Light from a very hazy or smoky sky 7,500-8,400 Light from a clear blue sky 12,000-27,000 338
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
