What physical mechanism causes chromatic aberration in a simple convex lens?

Answer

Different wavelengths of light are refracted at slightly different angles.

When white light passes through a single glass lens, it separates into its component colors because each wavelength (color) is bent, or refracted, by the glass at a unique angle, preventing them from meeting at a single focal point.

What physical mechanism causes chromatic aberration in a simple convex lens?

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