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MMLU-Pro / 9660 / A projector with a lens of 40 cm focal length illuminates an objectslide 4.0 cm…

Problem

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

question

A projector with a lens of 40 cm focal length illuminates an objectslide 4.0 cm long and throws an image upon a screen 20 m from the lens.What is the size of the projected image?

category

physics

options

  1. 240 cm
  2. 200 cm
  3. 220 cm
  4. 160 cm
  5. 180 cm
  6. 175 cm
  7. 150 cm
  8. 250 cm
  9. 196 cm
  10. 210 cm

src

stemez-Optics

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Source and history

Official source

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