Photon Energy: What is the photon energy of red light having a wavelength of 6.40 × 102 nm? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 1.13 × 10-19 J
B. 1.31 × 10-19 J
C. 3.11 × 10-19 J
D. 1.94 × 10-19 J
Answer: C
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