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How many spherical surfaces does a lens have?
AFour
BFive
CNine
DTwo
Answer & Solution
Correct answer: D. Two
1. This holds for convex and concave alike.
2. Each surface is part of a sphere.
3. A lens has two spherical surfaces.
_Source: NCERT Class 10 Science, Ch 10 'Light - Reflection and Refraction'_
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