Light rays travel in straight lines. Light cannot bend around opaque objects in their way. Shadows are created when an object blocks light from the Sun or another light source. When the light can ...

Can light itself cast a shadow? It may sound like a philosophical riddle, but researchers have found that under certain ...

The everyday objects around us are white, colored or black, opaque or transparent, depending on how the electrons in their atoms or molecules respond to the driving force of electromagnetic radiation ...

AN optical system has been constructed which makes possible the examination at high resolution by interference of opaque objects, and which is capable of being mounted on an ordinary microscope stand.

Discover how iron's opacity in the sun challenges scientific models, and how researchers are working to resolve the discrepancy.