alleryThe centres of the spheres forming a lens are called centres of:
ACurvature
BCoverage
CClearance
DCollision
Answer & Solution
Correct answer: A. Curvature
1. Each surface belongs to its own sphere.
2. The letter C represents them.
3. They are the centres of curvature.
_Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_
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