A photon of energy 5.0 × 10⁻¹⁹ J strikes a metal with a work function of 3.5 × 10⁻¹⁹ J. What is the velocity of the ejec
KE = 1.5×10⁻¹⁹ J. v = √(2KE/m) ≈ 5.74×10⁵ m s⁻¹.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Quantum Numbers - Principal Azimuthal Magnetic Spin