The work function of caesium is 2.14 eV. The threshold frequency of caesium is

Physics · Class 12 · CBSE — Dual Nature of Radiation & Matter

1. 5.16 × 10¹⁹ Hz
2. 5.16 × 10¹⁶ Hz
3. 5.16 × 10¹⁸ Hz
4. 5.16 × 10¹⁴ Hz

Answer

(D) 5.16 × 10 14 Hz

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