눈에 안 보이는 것들을 볼 수 있는 거울ㅋㅋㅋㅋㅋㅋㄹㅇ개신기함ㅋㅋ

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This device is called the 'Schlieren Device'.
It makes you see things you can't with your own eyes such as
formation and the flow of air, or difference of pressure, temperature, etc.
(I didn't check out the difference of pressure in this experiment)

(The thing I mentioned on the thumbnail seeing the smell is actually wrong statement. Technically it shows the flow of the heat from your breath. Of course, you can smell it..)

Refrences:
[1] What, How and Why The Secrets of Schlieren Photography - Abominable & Co.
[2] Seeing the Invisible : SLOW MOTION Schlieren Imaging - Veritasium
[3] Schlieren - Wikipedia
: https://en.wikipedia.org/wiki/Schlieren
[4] Schlieren Optics - Harvard University
: https://sciencedemonstrations.fas.har...
[5] Schlieren Imaging : Seeing air in a whole new light! - Bryan Rolfe

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