If a metal has a work function of 2.0 eV, what is the maximum kinetic energy of

If a metal has a work function of 2.0 eV, what is the maximum kinetic energy of the emitted electrons when illuminated with light of 5.0 eV energy?

If a metal has a work function of 2.0 eV, what is the maximum kinetic energy of the emitted electrons when illuminated with light of 5.0 eV energy?

Correct Answer: 3.0 eV

Step 1: Understand the work function (φ). The work function is the minimum energy needed to remove an electron from the metal. In this case, φ = 2.0 eV.
Step 2: Understand the energy of the light (hf). The energy of the light that hits the metal is given as 5.0 eV.
Step 3: Use the formula for maximum kinetic energy (KE). The formula is KE = hf - φ.
Step 4: Substitute the values into the formula. KE = 5.0 eV - 2.0 eV.
Step 5: Calculate the maximum kinetic energy. KE = 3.0 eV.

Photoelectric Effect – The phenomenon where electrons are emitted from a material when it is exposed to light of sufficient energy.
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, calculated as the difference between the energy of the incoming photons and the work function of the metal.