Class 12 NEET Physics Dual Nature of Matter and Radiation

Question : 10 of 107

Marks: +1, -0

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are 2.14‌eV,2.30‌eV and 2.75‌eV respectively. If incident electromagnetic radiation has an incident energy of 2.20‌eV, which of these photosensitive surfaces may emit photoelectrons?