Two light sources of intensities 8 cd and 12 cd are placed on the same – InterviewSolution

1.	Two light sources of intensities 8 cd and 12 cd are placed on the same side of a photometer screen at a distance of 40 cm from it, Where should a 80 cm source be placed to balance the illuminance ?
Answer» Two light sources of intensities 8 cd and 12 cd are placed on the same side of a photometer screen at a distance of 40 cm from it, Where should a 80 cm source be placed to balance the illuminance ?

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