A strange phenomenon occuring when viewing the moon through window screens

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Discussion Overview

The discussion centers around a phenomenon observed when viewing the moon through window screens, where participants note the appearance of strange light lines. The scope includes exploratory reasoning about the optical effects caused by the screen's structure.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant describes observing strange light lines when viewing the moon through window screens and notes similar effects with street lights and car headlights.
  • Another participant suggests examining the hole geometry of the screen as a potential explanation for the observed phenomenon.
  • A subsequent reply questions whether the lines are reflections of the tiny grids in the screen.
  • One participant confirms that the lines are indeed reflections of the wires and proposes that the effect resembles what a polarizer does with light waves, albeit at a much smaller scale.

Areas of Agreement / Disagreement

Participants express varying viewpoints on the cause of the phenomenon, with some focusing on the geometry of the screen and others on the optical effects related to polarization. No consensus is reached regarding the exact explanation.

Contextual Notes

The discussion does not address specific assumptions about the nature of light or the properties of the materials involved, leaving some aspects unresolved.

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TL;DR
Light lines occur when the Moon is seen through window screens
I found an strange phenomenon while observing the moon. When the moon is seen through the window screens, strange light lines will appear:

Half open screen:
99026600-9A7D-41CE-A950-BB4EBBDDB18A.jpeg


Closed screen:

40782643-95AA-49C0-B319-2FD14FA2CD4E.jpeg


Why is this happening? I saw similar things on street lights, car headlights, etc through screens.
 
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Have a look at the hole geometry of the screen.
 
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A.T. said:
Have a look at the hole geometry of the screen.
Do you mean those lines are reflections of the tiny grids?
 
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Yes, the reflections of the wires. But study the effect close and it will show you a representation of what a polarizer does with light waves. In the same way only at a far smaller spacing.
 
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