Dual Nature of Radiation and Matter

Question: If mean wavelength of light radiated by 100 W lamp is 5000 Å, then number of photons radiated per second are



1) $3 \times {10^{23}}$
2) $2.5 \times {10^{22}}$
3) $2.5 \times {10^{20}}$
4) $5 \times {10^{17}}$
Solution: Explanation: No Explanation
Photon and Photoelectric Effect

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