If a photon with energy 5 eV strikes a metal with work function 3 eV, what is th
Practice Questions
Q1
If a photon with energy 5 eV strikes a metal with work function 3 eV, what is the kinetic energy of the emitted electron?
2 eV
3 eV
5 eV
8 eV
Questions & Step-by-Step Solutions
If a photon with energy 5 eV strikes a metal with work function 3 eV, what is the kinetic energy of the emitted electron?
Step 1: Identify the energy of the photon, which is given as 5 eV.
Step 2: Identify the work function of the metal, which is given as 3 eV.
Step 3: Use the formula for kinetic energy of the emitted electron: K.E. = Photon energy - Work function.
Step 4: Substitute the values into the formula: K.E. = 5 eV - 3 eV.
Step 5: Calculate the result: K.E. = 2 eV.
Photoelectric Effect – The phenomenon where electrons are emitted from a metal surface when it absorbs photons with energy greater than the work function.
Work Function – The minimum energy required to remove an electron from the surface of a metal.
Kinetic Energy of Emitted Electrons – The energy of the emitted electrons is equal to the energy of the incoming photon minus the work function of the metal.
