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concave & convex lens of same mass &radii rotate about an axis passing through their centre &perpendicular to the plane which one will have greater mnment of inertia

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tclack
Well, moment of inertia is something like MR². (There are a few proportionality constants depending on the actual shape)

Concave lenses have more of their mass concentrated on the outer radius. So they should have a higher moment of inertia

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