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Formation of Image by a Convex Lens
A ray of light passing through the lens's optical center travels straight and without
deviation. Only in the case of a thin lens does this hold true.
After refraction, an incident ray parallel to the principal axis passes through the
focus.
After refraction, an incident ray passing through the focus of a lens emerges
parallel to the principal axis.
When the Object is Placed between F and O
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