Comments on: Double Vision http://mechanical-puzzles.com/double-vision/ Mechanical Puzzles, Brain Teasers & Games Wed, 01 May 2019 07:40:41 +0000 hourly 1 https://wordpress.org/?v=5.4.1 By: Ross Feinstein http://mechanical-puzzles.com/double-vision/#comment-1310 Wed, 01 May 2019 07:40:41 +0000 http://mechanical-puzzles.com/?p=2229#comment-1310 It’s actually called “TV Stone” and has a unique property that displays whatever image is underneath it, above it. Great use or a minerals inherent property to create a puzzle!!

]]> By: Allan Slocum http://mechanical-puzzles.com/double-vision/#comment-749 Wed, 10 Oct 2018 02:55:10 +0000 http://mechanical-puzzles.com/?p=2229#comment-749 Thank you for the review. The window in the cardboard box is to see the label on the bottom of the puzzle.

]]> By: admin http://mechanical-puzzles.com/double-vision/#comment-747 Tue, 09 Oct 2018 07:22:23 +0000 http://mechanical-puzzles.com/?p=2229#comment-747 In reply to George Bell.

George, I have no idea if its Calcite or not.

]]> By: George Bell http://mechanical-puzzles.com/double-vision/#comment-743 Mon, 08 Oct 2018 17:56:00 +0000 http://mechanical-puzzles.com/?p=2229#comment-743 My piece of calcite is cleaner, it is calcite isn’t it? I didn’t have much trouble solving the puzzle, but I am part physicist I suppose.

]]> By: Sandro http://mechanical-puzzles.com/double-vision/#comment-733 Sun, 07 Oct 2018 15:43:12 +0000 http://mechanical-puzzles.com/?p=2229#comment-733 If you want learn more about double refraction go to https://www.britannica.com/science/double-refraction

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