Light bends in glass dependent on its thickness. Blue comes from the thin part and red from the thick part of a prism.
Be cause it's white
The spectrum
The electro magnetic spectrum - A prism can split light into a spectrum of colors, and starlight is light. Detail your question and you will have a detailed answer, if this answer does not do the job
All the colors of the spectrum.
White light contains all of the colors in the visible spectrum. Black contains none of these colors.
Infrared and ultraviolet are the invisible colors at the opposite ends of the light spectrum.
Fartolongogist
a series of light and colors.
White light is all the colors of the light spectrum put together
It is the spectrum of visible light, which has the colors of the rainbow.
The White Light Spectrum.
Visible Light Spectrum.