Ray Optics and Optical Instruments: JEE Mains 2024 1st Feb Shift 1

Medium· Lenses and lens maker's formula· +4 / 0
Distance between virtual magnified image, (size three times of object) of an object placed in front of convex lens and object is 20 cm. The focal length of lens is xx cm, then xx is ______
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  • Previous-year question from JEE Mains 2024 1st Feb Shift 1.
  • Tagged medium difficulty.