Dr. Dean Jackson presents a fascinating optical illusion on TikTok involving a red fire truck. When a cyan filter is applied, viewers initially perceive the truck as red, despite it actually appearing grey without red light. The illusion reveals how the brain compensates for filters based on prior knowledge, recognizing the truck's typical color. With engaging insights on human vision, Dr. Jackson illustrates how photoreceptors react to color and light, highlighting a compelling example of visual perception influenced by context.
'Red light cannot pass through a cyan filter, it just can't,' he explained. 'So now there is no red light in that picture, I can promise you. And yet your brain is still telling you that it's red.'
'Your brain is overcompensating for the filter. The parts that you're being told are red are actually this colour,' Dr Jackson explains, as a grey square flashes up on screen.
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