The Wavelength of a Ruby Laser Is 694

question 26

Multiple Choice

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

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