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Translating step 20

Step 20
We take off a filter that we guess blocks visible light, allowing only IR light into the camera. We use some high-tech hacking to prove our theory: tape, a cellphone, and a remote control. VoilĂ ! Visible light filtered out, IR beam clearly shining through. Visual victory!
  • We take off a filter that we guess blocks visible light, allowing only IR light into the camera.

  • We use some high-tech hacking to prove our theory: tape, a cellphone, and a remote control.

  • VoilĂ ! Visible light filtered out, IR beam clearly shining through. Visual victory!

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