red, the colour with the longest wavelength, violet, the colour with the highest frequency, green, the colour in the middle of the spectrum, orange, the colour with the second largest wavelength, dispersion, the splitting of white light into the colours of the spectrum, visible spectrum, the rainbow of colours that make up white light, indigo, the colour with the second shortest wavelength, blue, shorter wavelengths than green but longer than indigo, yellow, the third longest wavelength & third lowest frequency

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