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Home Q & A Board Science-Related Homework Help Physics
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mikael mikael
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9 years ago
A laser pulse of duration 25 ms has a total energy of  2.0 J. If the wavelength of this radiation is  481 nm, how many photons are emitted in one pulse? 
A) 4.8 × 1018 
B) 1.2 × 1020 
C) 5.8 × 1019 
D) 1.9 × 1017 
E) 3.8 × 1017 
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padrepadre
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mikael Author
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9 years ago
Thanks for the homework assistance, my physics class is a big challenge.
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