OK, so, maybe the fact that, under vacuum, Scotch tape will emit enough hard x-rays to image the bones in your finger is slightly more impressive, but this is still a pretty cool trick from YouTuber TheFarmacyMan. My off-the-cuff explanation: Glass is frosted because of tiny imperfections in the surface, which refract passing light a’whichaways. The tape adhesive fills ’em in and, because its outer surface is flat, the rays can pass through more or less straight again. Frosting on both sides of the glass would presumably require tape on both sides for the effect to work. [via Boing Boing]

Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

  • http://twitter.com/UnstoppableDrew Drew Marold

    Same thing happens with water. If you’ve ever hand washed a frosted glass container, while it’s wet it gets clear, then as the water runs off goes back to translucent.

  • Anonymous

    Peeping Toms everywhere are rejoicing.

  • http://www.facebook.com/SteampunkProfessor Kenneth Warren

    Not as impressive as using it as a holographic storage medium. Now that was impressive.

  • http://www.facebook.com/Cory98122 Cory Johnson

    It’s not really a privacy risk since it only works on the frosted side (which is usually on the inside). It also works (just not quite as well) with dry erase markers, as seen here:

  • Anonymous

    Also works on old scratched up film for scanning. Also ruins the film.