Visible Light
Light, Sound and Waves

The types of yellow

Stories from Physics for 11-14 14-16 IOP RESOURCES

Yellow light can be perceived as the result of two mechanisms: ‘physical yellow’ which results from the incidence of 600 nm light on the eye and ‘psychological yellow’ which occurs when the eye detects equal amounts of red and green light. Humans cannot distinguish between these two different causes of the perception of yellow.


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