Light is something we use and need every day. It is a form of energy that allows us to see all around us! Lots of different sources produce light. Earth's main source of natural light is the Sun.

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

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.

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 ...

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