Converging and diverging lenses

  • Context: High School 
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    Converging Lenses
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Discussion Overview

The discussion revolves around the phenomena of image formation through converging and diverging lenses, focusing on how to determine whether an image is inverted or upright, as well as how to assess the size of the image based on ray diagrams.

Discussion Character

  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant inquires about how to conclude whether an image is inverted or upright based on ray diagrams used in freshman physics.
  • Another participant suggests that the orientation of the lines in the ray diagram indicates inversion, stating that if the top line ends up on the bottom, the image is inverted.
  • A follow-up question is posed regarding how the size of the image is determined.
  • A response indicates that the size can be determined by measuring the distance between the top and bottom lines where they leave the object and where they form the image, with the ratio indicating magnification or reduction.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus on the methods for determining image orientation and size, as participants provide different perspectives and explanations without resolving the inquiry.

Contextual Notes

Participants have not explicitly stated assumptions regarding the definitions of image orientation or the conditions under which the measurements are taken, leaving some aspects of the discussion open to interpretation.

rockind78
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Hello,

I am reading over the topic of converging and diverging lenses, and I had a question relating to phenomena of image formation as seen through these. Based on the ray diagrams that are typically used (freshman physics) how does one conclude whehter or not an image is inverted or upright? I know that a real versus virtual images depends on whether or not you have a convergence of the rays upon the focal point, but I am not sure about the former. Any insight would be wonderful! Thank you!
 
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Just look at the lines. If the line that was on the top ends up on the bottom, then the image is inverted.
 
Thank you for the prompt response. It is very much appreciated!:smile: . If it isn't too much trouble, would you mind explaining how the size of the image is determined as well?
 
Measure the distance between the top and bottom line where they leave the object, and between the top and botom line where they form the image. The ratio of the two dimensions tells you by how much the image is magnified or reduced.
 

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