A Metastable State Is Important for the Generation of a Laser

question 8

Multiple Choice

A metastable state is important for the generation of a laser beam because it assures that:

• A)spontaneous emission does not occur more often than stimulated emission
• B)photons do not split too rapidly
• C)more photons are emitted than are absorbed
• D)photons do not collide with each other
• E)photons do not make upward transitions

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Definitions:

Primary

Referring to the first or main element of a system or device, such as the primary coil in a transformer.

Secondary

Refers to the coil or winding in a transformer that receives energy from the primary winding and delivers it to the load.

Hysteresis

The lag in response exhibited by a body when external forces are applied and removed, often observed in magnetic and mechanical systems.

Distribution Transformer

A common transformer used by utility companies to change their line voltage into the 240/120 volts necessary to operate homes and small businesses.