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Electromagnetic radiation with a wavelength of 531 nm appears as green light to the human eye. The energy of one photon of this light is 3.74 × 10-19 J. Thus, a laser that emits 1.3 × 10-2 J of energy in a pulse of light at this wavelength produces __________ photons in each pulse.

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Electromagnetic radiation with a wavelength of 531 nm appears as green light to the human eye. The energy of one photon of this light is 3.74 × 10<sup>-1</sup>9 J. Thus, a laser that emits 1.3 × 10<sup>-2</sup> J of energy in a pulse of light at this wavelength produces __________ photons in each pulse.






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