The Secret of Parabolic Ghosts

NEW (Christmas 2019). Two ways to support Mathologer Mathologer Patreon:   / mathologer   Mathologer PayPal: paypal.me/mathologer (see the Patreon page for details) Today we'll perform some real mathematical magic---we'll conjure up some real-life ghosts. The main ingredient to this sorcery are some properties of x squared that they don't teach you in school. Featuring the mysterious whispering dishes, the Mirage hologram maker and some origami x squared.paper magic. Here is a nice article about the Mirage hologram gadget. A complete ray-trace analysis of the Mirage toy by Sriya Adhya, John W. Noé. The history part in particular makes for a fascinating read: https://www.spiedigitallibrary.org/co... As usual, thank you very much to Marty and Danil for their help with this video. Enjoy :)