AIPMT PRELIMS 2010 Physics Photon Energy MCQ Question
A source S₁ is producing 10¹⁵ photons per second of wavelength 5000 Å. Another source S₂ is producing 1.02 ×10¹⁵ photons per second of wavelength 5100 Å. Then (power of S₂)/(power of S₁) is equal to
0.98
1.00
1.02
1.04
Correct Answer
Detailed Explanation
The power ratio is given by P₂/P₁ = (n₂λ₁)/(n₁λ₂). Substituting the given values: P₂/P₁ = (1.02 × 10¹⁵ × 5000 Å) / (10¹⁵ × 5100 Å) = 1.
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