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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Definitions:

Short-Term Memory

A limited-capacity store that can maintain unrehearsed information for about 20 to 30 seconds.

Sensory Memory

The shortest-term element of memory, which allows individuals to retain impressions of sensory information after the original stimuli have ended.

Central Executive

A component of working memory in cognitive psychology that manages and directs attention and the processing of information from other working memory subsystems.

Sensory Regulator

A device or technique used to manage or modulate sensory input to help an individual maintain an optimal arousal level.