The boiling point of water in Kelvin is MCQ with Answer and Explanation
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Question #1
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The rate of change of momentum is equal to
Question #2
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The essential condition required for Laser action to occur in a medium is known as:
Correct Answer: Option C
Explanation:
Laser (Light Amplification by Stimulated Emission of Radiation) requires that more atoms exist in a high-energy excited state than in a lower energy state. This unnatural, non-equilibrium condition is called 'population inversion'. Without it, absorption would dominate over stimulated emission, and the beam would not be amplified.
Laser (Light Amplification by Stimulated Emission of Radiation) requires that more atoms exist in a high-energy excited state than in a lower energy state. This unnatural, non-equilibrium condition is called 'population inversion'. Without it, absorption would dominate over stimulated emission, and the beam would not be amplified.
Question #3
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Three resistors 2 Ω, 3 Ω, 6 Ω are connected in parallel. Equivalent resistance is
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