Define following terms:i. Longitudinal chromatic aberration ii. Circl

1.	Define following terms:i. Longitudinal chromatic aberration ii. Circle of least confusion iii. Transverse chromatic aberration
Answer» i. Longitudinal chromatic aberration: Due to different refractive indices and angle of deviations, violet and red colours of a white light converge at different focal points, f_V and f_R. The distance between f_V and f_R is measured as the longitudinal chromatic aberration. ii. Circle of least confusion: In presence of aberration the image is not a single point but always a circle. At particular location on the screen, this circle has minimum diameter. This is called circle of least confusion. iii. Transverse chromatic aberration: Radius of the circle of least confusion is called the transverse chromatic aberration.

Define following terms:i. Longitudinal chromatic aberration ii. Circle of least confusion iii. Transverse chromatic aberration

Answer»

i. Longitudinal chromatic aberration:

Due to different refractive indices and angle of deviations, violet and red colours of a white light converge at different focal points, f_V and f_R. The distance between f_V and f_R is measured as the longitudinal chromatic aberration.

ii. Circle of least confusion:

In presence of aberration the image is not a single point but always a circle. At particular location on the screen, this circle has minimum diameter. This is called circle of least confusion.

iii. Transverse chromatic aberration:

Radius of the circle of least confusion is called the transverse chromatic aberration.

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