Question 1 Report
A costume designer compares a charcoal-grey scarf under bright white studio lighting and under dim amber stage lighting. Although the wavelength information reaching the eye changes, she still sorts it into the same colour box as the other grey scarves.
(a) Name this perceptual phenomenon. [1]
(b) Explain how surrounding lighting helps the designer make this judgement. [2]
(a) Colour constancy [1] (b) The brain considers the illumination / surrounding colours [1]; it adjusts the perceived colour so the scarf is seen as grey in both conditions [1].
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