Question

when you see multiple colors on a dvd or cd, the reason for this is the property of _.
refraction
dispersion
dissipation
diffraction

Explanation:

The colorful patterns on a DVD or CD are due to the diffraction of light. Diffraction occurs when light waves encounter an obstacle or a slit and bend around it. The surface of a DVD/CD has a series of tiny pits and lands which act as a diffraction - grating, splitting white light into its component colors.

Answer:

diffraction