When white light passes through a prism, the colour which deviates the least is
When white light passes through a prism, the color which deviates the least is red. This is because red light has the longest wavelength among visible light colors, causing it to refract less sharply than other colors as it passes through the prism, resulting in the least deviation.
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When white light passes through a prism, the color which deviates the least is red (Option A). This deviation occurs due to the different wavelengths of light that make up white light. Red light has the longest wavelength, around 620-750 nanometers, among the visible spectrum. Because of its longer wavelength, red light experiences a lower refractive index in the prism material compared to colors with shorter wavelengths, such as violet. As a result, red light bends the least when passing through the prism. This principle of dispersion, where light is spread out into its constituent colors, demonstrates that each color refracts at different angles based on its wavelength. In the visible spectrum created by the prism, red light appears at the opposite end of violet, showing the least amount of deviation and appearing on the outer edge of the spectrum.