Dual Nature of Radiation and Matter

Question: Threshold wavelength for photoelectric effect on sodium is 5000 Å. Its work function is



1) 15 J
2) $16 \times {10^{ - 14}}J$
3) $4 \times {10^{ - 19}}J$
4) $4 \times {10^{ - 81}}J$
Solution: Explanation: No Explanation
Photon and Photoelectric Effect

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