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प्रश्न
Which type of lenses are:
thinner in the middle than at the edges?
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उत्तर
A concave lens is thinner in the middle than at the edges.
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क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
Which type of lenses are:
thinner in the middle than at the edges?
A concave lens is thinner in the middle than at the edges.