Explanation: Chromatic aberration is the defect in lens occurs when the light beam deflected by the lens is dispersed in its constituent colors. When the light beam deflected by the lens is dispersed in its constituent colors the image formed by the lens is not just a single point image it scatters images according to different colors of the light. There are two types of chromatic aberration Lateral chromatic aberration:The images formed in lateral chromatic aberration the image of stars is shifted to sideways of the real appearance of star.Longitudinal chromatic aberrationThe images formed in longitudinal chromatic aberration the image of stars is enlarged longitudinally to the real appearance of star. Thus, the image formed in this case is weaken longitudinallyWhen stars are observed from the earth the due to longitudinal chromatic aberration the image of star is weaken.
