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JEE Main 2017 Physics question

PhysicsRay Optics and Optical InstrumentsJEE Main 2017

A diverging lens with magnitude of focal length cm is placed at a distance of cm from a converging lens of magnitude of focal length cm. A beam of parallel light falls on the diverging lens. The final image formed is:

Answer: (2)

Solution

Take light travelling left to right and use with the Cartesian sign convention. **Diverging lens** ( cm): parallel light means , so

Missing argument for \frac\frac1{} = Missing argument for \frac\frac1{} = -Missing argument for \frac\frac1{25} = -25\ cm,

a virtual image cm to the left of the

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Question ID VK-115697