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(iii) Using the grid provided on page 13, plot a suitable graph to determine the values of a
and n. [4 marks]
(b) Use the graph to find the value of n.
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[2 marks]
(c) Use your value of n to find a.
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[2 marks]
(d) Suggest an accurate means of determining the time period, T.
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[2 marks]
(e) (i) Define the ‘refractive index’ of a medium.
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[2 marks]
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