What is color separtion in prism called?
The process that leads to the separation of colours is called dispersion. Refraction is where the light beam changes direction when it enters another medium, Relection is where the light beam is redirected back into the medium in which it was travelling before it hit a surface. Total internal reflection is where light enters a prism and instead of passing through the prism and back out on the other side, it reflects back into the prism due to the angle at which it hit the internal surface. You can use this to reflect light back into the direction it came from. So after all that rambling… then answer is a.
