Question: A laser emits at 424 nm in a single pulse that lasts 0.500 s. The power of the pulse is 2.80 MW. If we assume

A laser emits at 424 nm in a single pulse that lasts 0.500 μs. The power of the pulse is 2.80 MW. If we assume that the atoms contributing to the pulse underwent stimulated emission only once during the 0.500 μs, how many atoms contributed?

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