Refraction occurs as light passes from one medium to another only when there is a difference in the index of refraction between the two materials. The wavelength of incident light in the tutorial can be altered by using the Wavelength slider. ...

Which color of light will refract the most?

The shorter the wavelength of the light, the more it is refracted. As a result, red light is refracted the least and violet light is refracted the most - causing the coloured light to spread out to form a spectrum.

What happens when monochromatic light passes through a glass prism?

When monochromatic light passes through a glass prism, the light suffers double refraction, one at refracting surface at which it is incident at and the second at the opposite the refracting surface through which it emerges out in the air.