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ATOMIC STRUCTURE
Question #25477
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Question
Calculate the energy of a radiation source if it emits 2.5 × 10^15 photons in a 2 ns pulse.
A. 3.0 × 10^-19 J
B. 4.0 × 10^-19 J
C. 5.0 × 10^-19 J
D. 6.0 × 10^-19 J
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