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A lens thicker at the edges than at the middle is called:
AComplex
BConcave
CConvex
DCompound
Answer & Solution
Correct answer: B. Concave
1. It is bounded by two inward curving surfaces.
2. It spreads light rays apart.
3. It is a concave lens.
_Source: NCERT Class 10 Science, Ch 10 'Light - Reflection and Refraction'_
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