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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
23
Light: Geometric Optics
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23-2: Reflection; Plane Mirrors
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23-3: Spherical Mirrors
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23-4: Index of Refraction
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23-5: Refraction; Snell's Law
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23-6: Total Internal Reflection
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23-7 and 23-8: Thin Lenses
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23-9: Lens Combinations
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23-10: Lensmaker's Equation
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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 54
Q
  1. A 2.40-cm-high insect is 1.30 m from a 135-mm-focal-length lens. Where is the image, how high is it, and what type is it?
  2. What if f = -135 mm?
A
  1. 15.1 cm, real
  2. di=−12.2d_i = -12.2, virtual hi=0.226h_i = 0.226, upright.
Giancoli 7th Edition, Chapter 23, Problem 54 solution video poster
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COMMENTS
By theovilous on Tue, 4/2/2019 - 1:13 AM

There is a typo in the answer. In the video, the height of the image is 0.226cm but the answer on top is written 0.266cm. By the way I have been enjoying your physics videos. they are very helpful!!!

By Mr. Dychko on Tue, 4/2/2019 - 7:32 PM

I have updated the quick answer. Thank you very much for spotting that, and thanks also for the great feedback. I'm thrilled the solutions are helping with your studies!

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