GK
TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What was the active medium used in the first working laser ever constructed?
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A diamond block
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Helium-neon gas
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Carbon dioxide gas
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A ruby rod
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Explanation:
Detailed explanation-1: -Theodore Maiman made the first laser operate on 16 May 1960 at the Hughes Research Laboratory in California, by shining a high-power flash lamp on a ruby rod with silver-coated surfaces.
Detailed explanation-2: -Theodore Maiman invented the world’s first laser, known as the “ruby laser” in 1960. Ruby crystal is composed of aluminum oxide, where some of the aluminum atoms have been replaced with chromium atoms. Chromium gives the ruby its vibrant red color. In a ruby laser, a ruby crystal is formed into a cylinder.
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