The phenomenon of certain colours appearing to change brightness under different levels of illumination is called:____________?
Correct answer: B. Purkinje phenomenon
- A. Phi-phenomenon
- B. Purkinje phenomenon
- C. Emmert's phenomenon
- D. Stereoscopic phenomenon
Explanation
The Purkinje phenomenon describes the shift in relative brightness and colour sensitivity under different illumination levels, especially the greater apparent brightness of blues in dim light. The other phenomena involve apparent motion, size changes, or depth perception.
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