CAPE Physics Unit 2 · 2004 · Paper 2 · Question 3(a)

Investigation of the photoelectric effect using the apparatus shown in Figure 3a.

Show that the photoelectric equation hf - Φ = (1/2)m_e v^2 can be written as V = (hc/e)(1/λ) - (hc/e)(1/λ_0), where V is stopping potential, c is speed of light, e is electron charge, λ is wavelength of light used, and λ_0 is the cut-off wavelength.

This question uses a figure or table from the paper — you'll see it when you practise.