Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
25
Optical Instruments
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25-1: Camera
25-2: Eye and Corrective Lenses
25-3: Magnifying Glass
25-4: Telescopes
25-5: Microscopes
25-6: Lens Aberrations
25-7 to 25-9: Resolution Limits
25-11: X-Ray Diffraction
25-12: Imaging by Tomography

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 24
Q

A magnifier is rated at 3.5×3.5\times for a normal eye focusing on an image at the near point.

  1. What is its focal length?
  2. What is its focal length if the 3.5×3.5\times refers to a relaxed eye?
A
  1. 10 cm
  2. 7.1 cm
Giancoli 7th Edition, Chapter 25, Problem 24 solution video poster
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