Question

Remember, all energy answers should be given in eV. You will lose convention marks for not doing this.

4. A photon with wavelength of 450nm ejects an electron with 0.5eV of kinetic energy. What is the work function of the material the electron belonged to?

5. An electron (9.11 × 10−31kg) is moving at 3.00 × 106m/s. A photon of what wavelength would have the same momentum?

6. How many photons of wavelength 5.89 × 10−7m would it take to equal the momentum of a 5.00g pingpong ball moving at 8.25m/s?

Answer 1