state gov BPSC ASO Mock Test Series 2025 Physics Optics Refraction and Reflection

A converging lens of focal length f is placed in contact with a diverging lens of focal length 3f. The combination is

1
A diverging lens of focal length 3f/2
2
A converging lens of focal length 2f
3
A diverging lens of focal length 3f
4
A converging lens of focal length 3f/2
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