by the source per second is

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Monochromatic light of frequency 6.0 ×10^14 Hz is produced by a laser. The power emitted is 2 ×10^−3 W. The number of photons emitted, on the average, by the source per second is
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Monochromatic light of frequency 6.0 ×10^14 Hz is produced by a laser. The power emitted is 2 ×10^−3 W. The number of photons emitted, on the average, by the source per second is by the source per second is Monochromatic light of frequency 6.0 ×10^14 Hz is produced by a laser. The power emitted is [...]
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