IB Multiple Choice - Quantum Physics

Test yourself on IB Multiple Choice - Quantum Physics

• Which theory of light does NOT explain the photoelectric effect?

• Who proposed the photon theory of light?

• What is the equation for the threshold frequency in terms of the work function?

• The ground state of a certain type of atom has energy of –E₀. What is the wavelength of a photon with enough energy to ionize the atom when it is in the ground state, so that the ejected electron has kinetic energy equal to 2E₀?

• The least massive particle known to exist is the electron neutrino. Though scientists once believed that it had no mass, like the photon, they have now determined that this particle has an extremely low mass, equivalent to a few electron volts.

  Assuming a mass of 2.2 eV/c² (or 3.9 × 10^-36 kg) and a speed of 4.4 × 10⁶ m/s, which of the following values equals the neutrino’s de Broglie wavelength?