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B Why does cold air seem to optically zoom in far-away objects?

  1. Dec 26, 2017 #1
    I have noticed that cold air makes far away objects, such as mountains, appear closer than they do in warm clear weather. Does anyone have an explanation for this?
     
  2. jcsd
  3. Dec 26, 2017 #2

    A.T.

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    How exactly? Taller? Or clearer?
     
  4. Dec 26, 2017 #3
    They appear larger than when the air is warm. I already stated comparison to a CLEAR warm day, as heat can make the air hazy and of course that would affect their visibility.
     
  5. Dec 26, 2017 #4

    CWatters

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    Try taking photos to compare?
     
  6. Dec 26, 2017 #5

    A.T.

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    A temperature gradient can act like a lens, and make objects seem taller.
     
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