In the experiment, a high-power green laser passed through a ruby cube, illuminated from the side by a blue laser. The green laser increased the ruby’s absorption of the blue light, creating a darker ...

Sight begins with light. Look around and everything you perceive is the result of particles of light bouncing off surfaces and traveling to your eyes. For millennia visual artists have played tricks ...

Under very specific conditions, a laser beam can cast a shadow, challenging our traditional understanding of light. This unusual phenomenon, revealed by a team of researchers, paves the way for ...

A Flat Earth Society member is planning to build a rocket to see for himself that the world is not round. There are easier ways to determine the Earth's shape without leaving the atmosphere. The ...