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JEE Main 2020 Physics question

PhysicsRay Optics and Optical InstrumentsJEE Main 2020

In a compound microscope, the magnified virtual image is formed at a distance of 25 cm from the eye-piece. The focal length of its objective lens is 1 cm. If the magnification is 100 and the tube length of the microscope is 20 cm, then the focal length of the eye-piece lens (in cm) is .

Answer: 5

Solution

The paper's key is 5; its own working ends at = 25 × 19/106 ≈ 4.48

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Question ID VK-012498