Physics · May / June 2020 · Paper 42 · Question 6
0625
As printed in the paper
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6(a)[3]
incident ray travels straight on at first face of prism 1
ray reflected through 90° at sloping face of prism 1 continues vertically downwards to sloping face of prism 2
ray reflected through 90° at sloping face and leaves box horizontally
6(b)[2]
n = 1 / sin C in any form OR (n =) 1 / sin C
{(n=) 1 / sin 45 OR (n=) 1 / 0.707} AND (n=) 1.41
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