The table below shows accurate values for the refractive indices (relative to air) of
some optical media obtained during refraction experiments. The optical densities of the
media increase from water to diamond.
6.1 What important deduction about the relationship between a medium and its
refractive index can be made from the information above?(2)
6.2 Define the term refraction.(2)
The diagram below shows a light ray moving from medium A into water.
6.3 Provide a suitable calculation to identify medium A. (5)
Light travels from water into crown glass.
6.4 Will the refractive index of the crown glass relative to water be GREATER
THAN, LESS THAN or EQUAL TO the refractive index of crown glass in the
table above? (1)
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