Wow! And high praise for the Oscar Holland, who linked exactly the correct research article to describe the optics of this style of "magic mirror": https://www.

Wow! And high praise for the Oscar Holland, who linked exactly the correct research article to describe the optics of this style of "magic mirror": https://www.researchgate.net/publication/231068500_Oriental_magic_mirrors_and_the_Laplacian_image https://www.researchgate.net/publication/231068500_Oriental_... This also features in Ken Liu's Dandelion Dynasty series.