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2 marksProperties of Waves

CAPE Physics Unit 1 · 2016 · Paper 2 · Question 5(b)(iii)

Three transparent glass blocks, A, B and C, are arranged (not to scale) as shown in Figure 10. Each glass block has a different refractive index.

The refractive index of Glass Block C is 1.40. Calculate the critical angle between Glass Block A and Glass Block C.

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Other parts of this question

  1. 5(a)Briefly describe a laboratory experiment to prove Snell's law. Indicate any precautionary measures that must be taken during this experiment.[7 marks]
  2. 5(b)(i)Calculate the speed of light in Glass Block A. (Refractive index of Glass Block A = 1.80.)[2 marks]
  3. 5(b)(ii)Show that the angle θ in the figure is approximately 30 degrees.[2 marks]
  4. 5(b)(iv)State what happens to the light when it reaches the boundary between Glass Block A and Glass Block C. Justify your answer.[2 marks]

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