Question
Tue September 11, 2012 By: Vidhi Mehta

1. What is photometer principle? 2. What do you mean by absolute temperature of a body

Expert Reply
Wed September 12, 2012
The ratio of illuminating powers of two sources is equal to the ratio of the squares of their respective perpendicular distances from a screen , where they produce the same brightness .
 
absolute temperature:t+273=absolute temperature
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