The splitting of white Iight into its component colors is called dispersion of light.
When white light is passed through a prism dispersion of light occurs and when another prism is kept inverted the dispersed light which was formed will get back to white light. this is known as recombination of spectrum of light.
Spectrum of colors:
VIBGYOR -
V- Violet; I- Indigo; B- Blue; G- Green; Y- Yellow; O- Orange; R- Red.
