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Question
Why phosphorescence measurements are usually made at a low temperature?
Options:
A .  To prevent thermal degradation of the phosphorescent species
B .  To promote phosphorescence by slowing the rate of radiationless transfer processes
C .  To increase the efficiency of the detector
D .  To decease the efficiency of detector
Answer: Option B
Answer: (b).To promote phosphorescence by slowing the rate of radiationless transfer processes

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