Question

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what is longitudinal magnification ?​

Answer 1

Answer:

Longitudinal magnification denotes the factor by which an image increases in size, as measured along the optical axis.

Extra information:-

Optical axis is the straight line passing through the geometrical centre of a lens and joining the two centres of curvature of its surfaces. Sometimes the optical axis of a lens is called its principal axis.

Answer 2

Answer:

Longitudinal magnification denotes the factor by which an image increases in size, as measured along the optical axis.