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JEE Main 2023 (13 Apr, Shift 2) · Combination of Lenses

Combination of Lenses question from JEE Main 2023 (13 Apr, Shift 2)

Q34JEE Main 2023 · 13 APR · SHIFT 2Easy

Combination of Lenses

A bi convex lens of focal length $10\text{ cm}$ is cut in two identical parts along a plane perpendicular to the principal axis. The power of each lens after cut is ____________ D.

Numerical answer type. Work it out, then open the answer.

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Answer: 5

Cut perpendicular to the axis: each part is plano-convex with focal length $2f = 20\text{ cm}$ .
$P = \frac{100}{20} = 5\text{ D}$
Power of each part $= 5\text{ D}$ .

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