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It is the source of primary energy which excites the active medium.
According to the active medium, lasers can be classified into: a) using solid active mediums (crystals), i.
Argon lasers: Argon (5-7) is laser with an active medium of argon gas that is energized by a high-current electrical discharge.
Language is thus elevated from being a passive medium of communication to an active medium of the exercise of power, the accumulation of wealth, and socio cultural aggrandizement.
which measures the performance of the most active medium size firms dropped by