MHT CET · Physics · Ray Optics
A convex lens of focal length \(\frac{1}{3} \mathrm{~m}\) forms a real, inverted image twice the size of the object. The distance of the object from the lens is
- A 0.5 m
- B 0.166 m
- C 0.33 m
- D 1 m
Answer & Solution
Correct Answer
(A) 0.5 m
Step-by-step Solution
Detailed explanation
\(m = \frac{v}{u} \implies -2 = \frac{v}{u} \implies v = -2u\) \(\frac{1}{v} - \frac{1}{u} = \frac{1}{f} \implies \frac{1}{-2u} - \frac{1}{u} = \frac{1}{1/3} \implies \frac{-3}{2u} = 3\)
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