Tag: sunlight - combination of 7 lights

Refraction is a phenomenon that happens when a beam of white light passes through the interface between air and a denser medium, such as glass or water. Light travels more slowly in a denser medium, so it changes direction – or refracts – when it passes through the interface. White light is a mixture of all the wavelengths of light, and each wavelength refracts at a slightly different angle. Therefore, when the beam emerges from the denser medium, it has been split into its component wavelengths. The ones you can see form the familiar rainbow

Red colour having minimum refractive index and hence undergoes minimum deviation.

Violet colour having higher refractive index and hence undergoes maximum deviation.

Newton was the first to understand that white light consists of a mix of light rays, each with a different colour.

$\text{Defination of Dispersion :-}$