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8 marksScientific Method

CSEC Physics · January 2018 · Paper 2 · Question 1(a)(ii)

A student conducted an experiment on light travelling from glass to air. Figure 1 shows the setup, and Table 1 records the results.

Using the calculated values in Table 1, plot a graph of sin r against sin i on the grid on page 5.

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Other parts of this question

  1. 1(a)(i)Complete Table 1 by calculating the values of sin r and sin i.[5 marks]
  2. 1(a)(iii)Calculate the gradient of the graph.[4 marks]
  3. 1(b)State the name of the physical property represented by the gradient in (a)(iii).[1 mark]
  4. 1(c)(i)Explain the term 'critical angle'.[2 marks]
  5. 1(c)(ii)Using Table 1, or otherwise, state the critical angle for the glass used in (a).[1 mark]
  6. 1(d)If the refractive index from the cladding to the core is 1.03, calculate the critical angle in the core.[4 marks]

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