The optical power of a lens is increased from 0.1 D to 2.5 D. The magnitude of relative shift in focal length |Δf|/f₁ is:

Physics · Geometrical optics · lens and combination lens,silvered lens

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The optical power of a lens is increased from 0.1 D to 2.5 D. The magnitude of relative shift in focal length |Δf|/f₁ is:

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