Energy Levels: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 1.54 eV
B. 1.65 eV
C. 1.79 eV
D. 1.81 eV
Answer: C
Physics & Space Science
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?
?
a.
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b.
