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MHT CET 2024 (3 May, Shift 1) · Spherical Surfaces & Thin Lenses

Spherical Surfaces & Thin Lenses question from MHT CET 2024 (3 May, Shift 1)

Q40MHT CET 2024 · 3 MAY · SHIFT 1Easy

Spherical Surfaces & Thin Lenses

A convex lens of focal length ' $f$ ' $m$ forms a real, inverted image twice in size of the object. The object distance from the lens in metre is

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Answer: (d)

Real image with $|m| = 2$ : $u = -\frac{v}{2}$ .
$\frac{1}{v} + \frac{2}{v} = \frac{1}{f} \Rightarrow v = 3f$
$|u| = \frac{3f}{2} = 1.5f$
So the answer is (d) 1.5 f.

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