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A typical 100-watt light bulb consumes 100 J of energy per second. If a light bulb converts all of this energy to 400 nm light, how many photons are produced each second?
A) 5.0x10-28
B) 5.0x10-21
C) 5.0x10-19
D) 2.0x1020
E) 2.0x1029
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