The angular deviation is greatest for Violet.
The angle of deviation of a prism is defined as the angle between the incident ray and the emergent ray.
Violet deviates the most
- Since the wavelength of different components of light is different and the frequency is constant, each component gets deviated by a different angle due to the difference in velocity in the glass medium.
- The red colour having the maximum wavelength deviates the least and forms the upper part of the spectrum whereas violet having the least wavelength deviates the most.