CUET and UG exam CUET UG 2025 Mock Test Series Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
When a photon of energy hν falls on a photosensitive metallic surface (work function hν₀), electrons are emitted from the metallic surface. It is possible to say that:
1
All ejected electrons have the same KE equal to (hν - hν₀)
2
The ejected electrons have a distribution of KE, the most energetic ones having KE equal to (hν - hν₀)
3
The most energetic electrons have KE equal to hν
4
The KE of ejected electrons is hν₀