or translucent objects like this clear silicone lid. But a shadow forms when an opaque, or non-transparent, object blocks light from passing through and reaching a surface on the other side.

The closer to the light source an object is, the bigger the shadow will be. This is because the object blocks more of the light. The further away from the light source an object is, the smaller ...

As the countdown to the year's first total lunar eclipse begins, here's what to know about the difference between a lunar ...