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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 emits a pulse of light that lasts 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of  180 mJ. How many photons are emitted in each pulse? 
A) 6.2 × 1017   
B) 8.0 × 1026 
C) 9.8 × 1036 
D) 1.2 × 1043 
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padrepadre
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mikael Author
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#2
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9 years ago
Thanks for the homework assistance, my physics class is a big challenge.
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#3
3 years ago
Thank you
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