I’ve learnt in physics that objects are different colours becsuse of the light they refract that then enters our eyes. For example, a red ball is red because it absorbs orange, yellow, green, blue, indigo and violet light, but refracts red light into our eyes.
But my question is: what exactly makes this ball only refract red light? What is it about red light that means it’s the only light that can be refracted from a red ball? What are differences between the chemical properties of a red ball and a blue ball, which are both made from the same material, but refract different light?
We’re also taught that chlorophyll turns leaves green, as it makes it so only green light is refracted. But why green light in particular?
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Think of any object like a filter. The gels on stage lights for example. They filter out all but the desired color. The dyes and pigments that make up everything we see are just filters.
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