The angular deviation is greatest for_____________

The angular deviation is greatest for Violet.

Explanation

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.