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MMLU-Pro / 10092 / The diameter of the objective lens of a telescope is 30 mm and the angular…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

The diameter of the objective lens of a telescope is 30 mm and the angular magnification of the instrument is 5x. If the diameter of the pupil of the observer's eye is 5 mm, what fraction of the area of the objective is actually utilized?

category

physics

options

  1. 80%
  2. 70%
  3. 100%
  4. 30%
  5. 40%
  6. 90%
  7. 25%
  8. 60%
  9. 50%
  10. 10%

src

stemez-Optics

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