At what point are the incident rays parallel to the main optical axis going?
| January 15, 2021 | education
The main optical axis is a straight line that passes through the center of the spherical lens surface. Rays incident parallel to the main optical axis, after refraction in the lens, are collected at a point on the main optical axis, which is called the focus of the collecting lens (F). The focus of the collecting lens is real, therefore positive.
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