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Nithya Baskaran
's Polls
Technology
What was the active medium used in the first working laser ever constructed?
A diamond block
2 votes (100%)
A diamond block
A ruby rod
0 votes (0%)
A ruby rod
Helium-neon gas
0 votes (0%)
Helium-neon gas
CO2 gas
0 votes (0%)
CO2 gas
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2 votes
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Wolmal
(256 symbols max)
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