After being dispersed from a prism, white light splits into seven colours. Which colour will be refracted the most?
Refraction depends on the wavelength of light. Shorter the wavelength of light, more will be the deviation of light ray. Among the 7 constituent colours of visible light, violet light has the least wavelength and hence it deviates the most and red light having the largest wavelength deviates the least.
From the figure, it is clear that violet refracts the most.