Question

The angular deviation is greatest for ___.

Answer 1

Angle of deviation

1. The change of direction when light passes from one medium to another is called the deviation of light.
2. The angle between the path it would have taken if there was no change in medium and the new path is called the angle of deviation.
3. A prism is a triangular solid made of glass.
4. When light passes through a prism, it deviates when it enters the prism and it deviates again when it exits the prism.
5. The angle at which light enters the prism is called the angle of incidence.
6. The angle at which light exits is called the angle of emergence.
7. Since the wavelength of different components is different, each component of white light gets deviated differently in the medium.
8. Red - which has the longest wavelength - gets deviated the least, and violet - which has the shortest wavelength - gets deviated the most.
9. Therefore, the angular deviation is the greatest for violet.