What determines the primary colors of a rainbow?

A rainbow is a meteorological phenomenon that is caused by the refraction, reflection, and dispersion of light in water droplets in the atmosphere. It is a multicolored arc of light that appears in the sky when sunlight is refracted by the tiny water droplets in the atmosphere. The primary colors in a rainbow are the colors of the visible light spectrum: red, orange, yellow, green, blue, indigo, and violet.

The colors of the rainbow are determined by the physics of light. When light passes through a prism or is refracted by water droplets in the atmosphere, it is split into its component colors. Each color of light has a different wavelength, and each wavelength is bent differently by the refraction and reflection of the water droplets in the atmosphere. This causes the colors of the visible light spectrum to be separated and appear in a distinct arc in the sky.

The primary colors of a rainbow are determined by the physics of light, and the order of the colors is determined by the order of the visible light spectrum. Red is the longest wavelength and is bent the least, while violet is the shortest wavelength and is bent the most. This causes the colors to appear in the same order as the spectrum, from red on the outside of the arc to violet on the inside.