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

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Discussion Overview

The discussion centers around the optical effects of cold air on the perception of distant objects, particularly how they may appear closer or larger compared to warm air conditions. Participants explore the implications of temperature gradients on visibility and clarity, as well as the potential for photographic evidence to support observations.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants observe that cold air makes distant objects, like mountains, appear larger and closer than on warm days.
  • There is a suggestion that the clarity of the air in cold conditions may contribute to this perception, as warm air can introduce haze.
  • One participant proposes that a temperature gradient could function like a lens, potentially making objects seem taller.
  • Another participant suggests taking photographs to compare the visual differences between cold and warm air conditions.

Areas of Agreement / Disagreement

Participants express varying observations regarding the effects of cold air on the appearance of distant objects, with no consensus reached on the exact mechanisms or implications of these observations.

Contextual Notes

The discussion does not resolve the underlying assumptions about optical phenomena or the specific conditions required for these effects to manifest.

Fanny Viksten
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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?
 
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Fanny Viksten said:
...appear closer ...
How exactly? Taller? Or clearer?
 
A.T. said:
How exactly? Taller? Or clearer?
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.
 
Try taking photos to compare?
 
Fanny Viksten said:
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.
A temperature gradient can act like a lens, and make objects seem taller.
 
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