Light can travel through transparent objects, like glass,or translucent objects like this clear silicone lid. But a shadow forms when an opaque, or non-transparent, object blocks light from ...

We call these translucent or semi-transparent. Objects that let no light through are opaque. The closer to the light source an object is, the bigger the shadow will be. This is because the object ...

Ever noticed those irritating transparent worm-shaped objects floating around in your ... Floaters are nothing but shadows ...