CSEC Physics · January 2014 · Paper 2 · Question 4(b)(ii)

Electromagnetic waves of one wavelength are absorbed by a solar panel and waves of a longer wavelength are emitted. If electromagnetic waves of wavelength λ₁ = 2 × 10⁻⁷ m are absorbed by a solar panel as shown in Figure 3 and waves of wavelength λ₂ = 6.5 × 10⁻⁵ m are emitted, calculate

We assume that the useful energy transferred to the solar panel is a constant, k, times the decrease in frequency of the e.m. waves. (E = kΔf). State the corresponding energy transferred, E₁, in terms of k.

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