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.
A) 2.9 × 10-17
B) 9.2 × 10-24
C) 1.8 × 1019
D) 3.5 × 1016
E) 6.5 × 1013
Correct Answer:
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