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24 August, 04:53

How many photons with 10 ev are required to produce 20 joules of energy?

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  1. 24 August, 05:00
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    1 joule = 6,242e+18ev

    20 joule = 20 joule * 6,242e+18 ev/joule = 1,248e+20 ev

    1,248e+20 ev / (10 ev / photon) = 1,248e+19 photons.
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