Vivek Goyal isn’t a professional photographer, but he and his colleagues have developed an intriguing party trick: They can capture the image of an object completely out of sight. They demonstrated ...

Light travels in straight lines. If an object is transparent, it means you can see through the object clearly as light passes through it. There are objects that let some light through, but not enough ...

They’re dark patches of shade where light does not reach. Light can travel through transparent objects, like glass,or translucent objects like this clear silicone lid. But a shadow forms when an ...