Between red and violet, which carries more energy in the visible spectrum?

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Multiple Choice

Between red and violet, which carries more energy in the visible spectrum?

Explanation:
Energy per photon in light is determined by its frequency (or, equivalently, its wavelength): higher frequency means higher energy. In the visible spectrum, violet light has a shorter wavelength and thus a higher frequency than red light. Because energy scales with frequency (E = hf) and inversely with wavelength (E = hc/λ), violet photons carry more energy than red photons. That same idea explains why yellow and green sit between them in energy, with red having the least. So between red and violet, violet carries more energy. (Red ≈ longer wavelength; violet ≈ shorter wavelength.)

Energy per photon in light is determined by its frequency (or, equivalently, its wavelength): higher frequency means higher energy. In the visible spectrum, violet light has a shorter wavelength and thus a higher frequency than red light. Because energy scales with frequency (E = hf) and inversely with wavelength (E = hc/λ), violet photons carry more energy than red photons. That same idea explains why yellow and green sit between them in energy, with red having the least. So between red and violet, violet carries more energy. (Red ≈ longer wavelength; violet ≈ shorter wavelength.)

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