Optics problem!

Classical Mechanics Level 2

Three lenses having powers 10 D, -10 D and 10 D are placed on a common principal axis. All are separated by 5 cm. Where is the apparent focus of this lens system?


  • Distance from the Focus to be given in reference to the last lens. Eg: 2 cm away from the last lens (only enter the number, in cm).

  • All are of the same material and are placed in air.


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