CAPE Physics Unit 2 · May/June 2026 · Paper 2 · Question 3(b)(i)

In a photoelectric emission experiment using the apparatus in Figure 6, the potential difference between the electrodes is adjusted until it reaches the stopping potential, V_s. The incident wavelength, λ, is varied and corresponding values of stopping potential are recorded. The results of the experiment are recorded in Table 2.

Using the equation f = c/λ, complete Column 3 of Table 2.

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