Question

What is the difference between dispersion and refraction?

Answer 1

Hey mate here is ur answr
Dispersion. It is the splitting of light into different directions with differnt speeds
Refraction. It is the bending of light when it falls obliquely on a object.
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Answer 2

Refraction refers to any bending of waves due to a change in speed. When water waves move through different depths, the wave is said to be refracted.

Dispersion in your context refers to the frequency dependence of refraction. In the case of light being refracted by a prism, dispersion means that the higher frequency light bends more.  

In short, refraction is the bending of light, and dispersion is the frequency dependence of this behavior.