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MMLU-Pro / 9342 / The principal refracting powers of a thin lens are + 4 and - 5dptr. If the…

Problem

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question

The principal refracting powers of a thin lens are + 4 and - 5dptr. If the refracting power in an oblique normal section is + 2dptr, what will be its refracting power in a normal section at right angle to the first? What is the angle of inclination of the + 2 section to the + 4 section?

category

physics

options

  1. -1dptrs, 29° 8' 40''
  2. +3dptrs, 33° 15' 5''
  3. 0dptrs, 27° 9' 50''
  4. -4dptrs, 32° 5' 55''
  5. -4dptrs, 26° 5' 15''
  6. -2dptrs, 30° 10' 20''
  7. -6dptrs, 31° 12' 45''
  8. -5dptrs, 24° 6' 40''
  9. +1dptr, 25° 3' 10''
  10. -3dptrs, 28° 7' 32''

src

stemez-Optics

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