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The active medium of a helium- neon laser is made up of __________ ratio of helium and neon.
: 8
: 7
: 9
10: 1
10: 1
Practice and solve "The active medium of a helium- neon laser is made up of __________ ratio of helium and neon...." for Electrical - Electrical Materials. The correct answer is Option D: 10: 1. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(d) **