Horace89
Horace89 Horace89
  • 20-04-2024
  • Physics
contestada

A lens of focal length 40 mm is used as a magnifier. The object being viewed is 6.8 mm long, and is positioned at the focal point of the lens. The lens is moved closer to the object, so that the image is now 20 cm from the lens. The distance the lens has been moved, in cm, is closest to:

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