What is the term for the process in which white light separates into colors?

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The process in which white light separates into colors is known as dispersion. This phenomenon occurs when light passes through a medium, such as a prism, causing different wavelengths of light to bend by different amounts due to their varying speeds in the medium. As a result, white light, which is a mixture of all visible wavelengths, is split into its constituent colors, typically observed as the spectrum that includes red, orange, yellow, green, blue, indigo, and violet.

Dispersion is crucial for understanding various optical phenomena, including rainbows, which occur when sunlight is dispersed by water droplets in the atmosphere. The distinct bending angles for different colors lead to the creation of the beautiful arcs in the sky.

Refraction, while related to the bending of light, refers specifically to the change in direction of light as it passes from one medium to another. Diffraction is the bending of light as it encounters obstacles or openings. Reflection involves the bouncing back of light when it strikes a surface. While all of these processes involve light interacting with different mediums or surfaces, only dispersion specifically describes the separation of white light into its component colors.