JEE Main 28 Jan 2026 Shift 2 Paper Solved Paper
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Number of photons of equal energy emitted per second by a 6 mW laser source operating at 663 nm is _ _ _ _ h = 6.63 × 10 − 34 c = 3 × 10 8 m ∕ s
[28 Jan 2026 Shift 2]
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