Physics
A ray of light incident at a point on the principal axis of a convex lens passes undeviated through the lens.
(a) What special name is given to this point on the principal axis?
(b) Draw a labelled diagram to support the answer in part (a).
Refraction Lens
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Answer
(a) This point on the principal axis is called Optical Centre.
(b) Below labelled diagram shows the Optical Centre for Convex and Concave lens:
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