What was the active medium used in the first working laser ever constructed?
A.A diamond block
B.Helium-neon gas
C.A ruby rod
D.Carbon dioxide gas
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the active medium used in the first working laser ever constructed was a ruby rod
Answered by
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ĀNSWĒR ⏬⏬
C.A ruby rod
THANKS ✌
C.A ruby rod
THANKS ✌
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