NEET 2023

NEET 2023 Physics question on Dual Nature of Radiation

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are 2.14 eV, 2.30 eV and 2.75 eV respectively. If incident electromagnetic radiation has an incident energy of 2.20 eV, which of these photosensitive surfaces may emit photoelectrons?
  1. A.
    Cs only
  2. B.
    Both Na and K
  3. C.
    K only
  4. D.
    Na only
Show answer

Correct option: A

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