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MMLU-Pro / 9985 / What is the refracting power of a concave mirror of radius 20 cm when the…

Problem

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

question

What is the refracting power of a concave mirror of radius 20 cm when the reflecting surface is in contact with (a) air (n = 1) and (b) water (n = 1.33; n denotes index of refraction)?

category

physics

options

  1. 30 diopters in air, 39.99 diopters in water
  2. 25 diopters in air, 33.325 diopters in water
  3. 20 diopters in air, 26.66 diopters in water
  4. 12.5 diopters in air, 16.6625 diopters in water
  5. 17.5 diopters in air, 23.325 diopters in water
  6. 2.5 diopters in air, 3.3325 diopters in water
  7. 15 diopters in air, 20 diopters in water
  8. 10 diopters in air, 13.33 diopters in water
  9. 7.5 diopters in air, 10 diopters in water
  10. 5 diopters in air, 6.665 diopters in water

src

stemez-Optics

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Source and history

Official source

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