Multiple Choice
A light beam from a 2.1-mW He-Ne laser has a wavelength of 633 nm. How many photons does the laser emit in one second? (h = 6.626 × 10-34 J ∙ s, c = 3.00 × 108 m/s)
A) 6.7 × 1015
B) 8.8 × 1015
C) 1.1 × 1016
D) 1.3 × 1016
Correct Answer:
Verified
Correct Answer:
Verified
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