CSEC Physics · May/June 2011 · Paper 2 · Question 4(b)(iii)

Figure 2 shows a narrow beam of white light which is shone onto a triangular prism at an angle of incidence of 30°.

Calculate the frequency of violet light if the wavelength in air is 430 nm. [1 nm = 10⁻⁹ m, Velocity of light in air = 3.0 × 10⁸ m s⁻¹]

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