Optical Pumping of a Ruby Laser Is Achieved Using Photons

question 49

Multiple Choice

Optical pumping of a ruby laser is achieved using photons of energy 2.25 eV. The laser light consists of photons of energy 1.79 eV, emitted in a transition that goes to ground. What is the energy of the transition from the pumped stated to the metastable state?

• A) 2.25 eV
• B) 1.79 eV
• C) 4.04 eV
• D) 0.46 eV
• E) 1.30 eV

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