The Purpose of the Mirrors at the Ends of a Helium-Neon

question 57

Multiple Choice

The purpose of the mirrors at the ends of a helium-neon laser is:

• A)to assure that no laser light leaks out
• B)to increase the number of stimulated emissions
• C)to absorb some of the photons
• D)to keep the light used for pumping inside the laser
• E)to double the effective length of the laser

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Definitions:

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