AIIMS 2004 Physics Lasers Assertion Reason Question
Assertion : In He⁻Ne laser, population inversion takes place between energy levels of neon atoms.
Reason : Helium atoms have a meta-stable energy level.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
Assertion is true but Reason is false
Assertion is false but Reason is true
Correct Answer
Detailed Explanation
Helium-neon laser uses a gaseous mixture of helium and neon.
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