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MMLU-Pro / 9465 / Three lenses with focal lengths of + 10 cm, - 10cm, and + 10 cm, respectively,…

Problem

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question

Three lenses with focal lengths of + 10 cm, - 10cm, and + 10 cm, respectively, are placed one behind the other, 2 cm apart. If parallel light is incident on the first lens, how far behind the third lens will the light come to a focus?

category

physics

options

  1. + 20 cm
  2. + 7.91 cm
  3. - 10 cm
  4. + 15 cm
  5. + 5 cm
  6. - 20 cm
  7. + 40 cm
  8. + 10 cm
  9. - 7.91 cm
  10. + 30 cm

src

stemez-Optics

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