1 The Ultimate Question
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Fig. 1.1 A stick immersed in water appears broken at the water’s surface due to
refraction (i.e. bending) of the light as it crosses the boundary between water and
air
Fig. 1.2 Bezold effect: Optical illusion produced by the contrast between two
different coloured backgrounds. Image: Public Domain (https://en.wikipedia.org/wiki/
File:Bezold_Effect.svg (accessed 2020/5/8))
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Fig. 1.1 A stick immersed in water appears broken at the water’s surface due to
refraction (i.e. bending) of the light as it crosses the boundary between water and
air
Fig. 1.2 Bezold effect: Optical illusion produced by the contrast between two
different coloured backgrounds. Image: Public Domain (https://en.wikipedia.org/wiki/
File:Bezold_Effect.svg (accessed 2020/5/8))