Red
Blue
Yellow
Violet
Explanation
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Explanation
Longest Wavelength: Red light has the longest wavelength in the visible spectrum, ranging from approximately 625 to 740 nanometers (nm).
Energy and Frequency: Because wavelength is inversely proportional to frequency and energy, red light has the lowest frequency and the lowest energy among the visible colors.
Order of Spectrum: The visible spectrum is often remembered by the acronym ROYGBIV (Red, Orange, Yellow, Green, Blue, Indigo, Violet), which lists colors from longest to shortest wavelength.
Why other options are incorrect
B. Blue: Blue light has a much shorter wavelength than red, typically between 435 and 500 nm.
C. Yellow: Yellow light falls in the middle of the spectrum with a wavelength of approximately 570 to 590 nm, which is shorter than red but longer than blue.
D. Violet: Violet has the shortest wavelength in the entire visible spectrum, measuring approximately 380 to 450 nm.
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PEACE ✌️
