Since the publication of Hockney's provocative thesis, several objections have been raised. For example, it has been claimed that Hockney's projection technique would have required a mirror of very ...

A concave mirror reflects a real, inverted image of a light bulb filament onto the wall. Covering parts of the filament or mirror with an index card illustrates the nature of image formation under a ...

The world looks like it has been flipped on its head in this surreal image with a passerby keen to capture it for posterity. But this man has not stumbled into a mysterious landscape, he has just come ...