Task id16591
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Task id16591
Two electric lamps giving luminous intensity I1 = 15 cd and l2 = 60 cd are located at a distance l = 180 cm from one another. At what distance from the lamp that gives greater luminous intensity, on the line connecting them, should a paper screen with an oil stain be placed so that the stain becomes invisible?
Additional information:
Detailed solution. Format gif
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