Photon Energy: For what wavelength does a 100-mW laser beam deliver 1.6 × 1017 photons in one second? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 320 nm
B. 330 nm
C. 340 nm
D. 350 nm
Answer: A
Physics & Space Science
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