The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be

Physics · JEE Main · NTA Exams — Dual Nature of Matter and Radiation

1. 2900 \(\text { A }\)
2. 2500 \(\text { A }\)
3. 5380 \(\text { A }\)
4. 1200 \(\text { A }\)

Answer

(C) 5380 A

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