Question:medium

Match List-I with List-II
List-I Concept / Device List-II Description
A Optical Pumping II Population Inversion
B He-Ne Laser I Four Level Laser
C Ruby Laser III Three Level Laser
D Optical Resonator IV Pair of optically plane parallel mirrors

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Ruby laser is a three-level laser, while He-Ne laser is a four-level laser.

Updated On: May 20, 2026

A-I, B-II, C-III, D-IV
A-II, B-I, C-III, D-IV
A-I, B-II, C-IV, D-III
A-IV, B-III, C-II, D-I

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The Correct Option is B

Solution and Explanation

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