The derivation of lens maker formula in Class 12 explains the relationship between focal length, refractive index, and radii of curvature of a lens. It is derived using refraction at spherical surfaces.
Question : A person suffering from long-sightedness wears spectacles having:
Option 1: concave-convex lens
Option 2: lenses with negative
Option 3: concave lenses
Option 4: convex lenses
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