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3 marksPhysical Quantities

CAPE Physics Unit 1 · 2010 · Paper 2 · Question 2(b)(iii)

A graph on page 9 shows the relationship between the sines of the angle of incidence (θ₁) and the angle of refraction (θ₂) for monochromatic yellow light traveling from glass to air.

Use the gradient of the graph to determine the refractive index of the glass for this colour light.

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Other parts of this question

  1. 2(a)(i)Draw rays to show the passage of white light through Figure 2, a diffraction grating.[4 marks]
  2. 2(a)(ii)Draw rays to show the passage of white light through Figure 3, a triangular glass prism.[1 mark]
  3. 2(a)(iii)Draw rays to show the passage of white light through Figure 4, a rectangular glass block.[1 mark]
  4. 2(b)(i)Use the graph to find the missing values of θ₁ and θ₂, and insert them in the table below. State the value of the critical angle of the glass.[7 marks]
  5. 2(b)(ii)Describe what happens when the angle of incidence θ₁ is 55°.[1 mark]

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