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JEE PHYSICS MCQ: NUCLEI
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Medium
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Understanding
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Assertion: In He-Ne laser, population inversion takes place between energy level of neon atoms.
Reason: Helium atom has a metastable energy level.
Reason: Helium atom has a metastable energy level.
View answer and explanation
Correct option: B
If both assertion and reason are true and reason is not correct explanation of assertion.
Option B (If both assertion and reason are true and reason is not correct explanation of assertion) is correct because both the assertion and reason are true, but the reason doesn't explain the assertion.
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