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JEE Main 2026 Physics question

PhysicsRay Optics and Optical InstrumentsJEE Main 2026

A concave mirror of focal length 10 cm forms an image which is double the size of object when the object is placed at two different positions. The distance between the two positions of the object is cm.

Answer: 10

Solution

For a real, inverted image (m=−2): v=2u with 1/v+1/u=−1/10 gives u=−15 cm. For a

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Question ID VK-015609