The number of photons emitted in 10 hours by 60 W sodium lamp (lambda= – InterviewSolution

1.	The number of photons emitted in 10 hours by 60 W sodium lamp (lambda= 5893 Å) is about :
Answer» `6.4 XX 10^20` `6.4 xx 10^24` `3.2 xx 10^24` `1.4 xx 10^22` ANSWER :B

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