Asked by r
what prisim joins all of the colors from white ligth
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GPT-5 mini
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A triangular glass prism (the common dispersing prism) splits white light into its colors by refraction (dispersion). To join those separated colors back into white light you use a second identical prism placed upside down (reversed orientation) so its dispersion undoes the first prism’s. This is what Newton did: one prism spreads the spectrum, a second inverted prism recombines the spectrum back into white light.
Why it works: different wavelengths refract by different amounts in the first prism. The second prism applies the opposite refraction, so the angular separation is cancelled and the beams overlap again as white light.
Why it works: different wavelengths refract by different amounts in the first prism. The second prism applies the opposite refraction, so the angular separation is cancelled and the beams overlap again as white light.
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