There are many different types of lasers—almost as many as there are applications for the same—but what ties them all together as a class is that they depend on the same physical effect: stimulated ...

(THE CONVERSATION) Nations around the world are rapidly developing high-energy laser weapons for military missions on land and sea, and in the air and space. Visions of swarms of small, inexpensive ...

The USS Portland test-fires a laser weapon. The photo captured infrared light to make the beam visible. Staff Sgt. Donald Holbert/Marine Corps via AP Nations around the world are rapidly developing ...

A team of physicists from the University of Innsbruck and Harvard University has proposed a fundamentally new way to generate ...

Natural light profoundly affects our biology, from how well we sleep, to our brain function and immune response. The ancient Egyptians used solar radiation to disinfect and heal chronic wounds and ...

In conventional lasers, mirrors are essential to bounce light back and forth, stimulating coherent emission from excited atoms or molecules, and thus light amplification.

Scientists have developed a revolutionary laser treatment to prevent blindness. This non-invasive therapy uses ultra-short ...