A colored-dot number plate can form a hidden number by arranging many small circles of different shades and sizes so that the number is visible only because its circles have a different color from the background circles.

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A fundamental characteristic of human sight is color vision, the ability to perceive the world in a spectrum of colors rather than in monochrome. This allows for the differentiation of objects based on the wavelengths of light they reflect.

Human Color Vision

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

Human vision includes the ability to perceive the world in three dimensions (height, width, and depth), rather than as a flat, two-dimensional image. This capacity, known as depth perception, is crucial for judging distances and navigating the environment.

Human Depth Perception

Based on the principles of how color is perceived, explain why the individual sees these specific new colors (red and blue) in the afterimage.

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