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Per NCERT §9.3.3, what is the OPTICAL CENTRE of a lens?
AThe focal point
BThe radius of curvature
CA point on the lens edge
DA point on the principal axis through which a ray passes WITHOUT deviation
Answer & Solution
Correct answer: D. A point on the principal axis through which a ray passes WITHOUT deviation
Per NCERT §9.3.3, optical centre = point of no deviation. Rays through it pass undeviated.
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