Using a green laser beam, a ruby crystal, and blue light illumination, they demonstrated that light, under specific conditions, could block another light source, creating a visible shadow.

To ask if a beam of light can make a shadow sounds like a sort of Zen paradox, but physicists have demonstrated the possibility. They used a laser beam to block another laser beam, albeit with ...

Just when you think you've seen it all, researchers claim to have developed a way for people to see a color the human eye has previously never seen before. They're calling this new shade 'Olo.' ...

The boy "reported playing with a green laser pointer and repeatedly gazing into the laser beam," the report said. ['Eye' Can't Look: 9 Eyeball Injuries That Will Make You Squirm] ...

In the last 20 years, green lasers have shrunk from table-size lab equipment to pocket-portable presentation tools (not to mention cat toys). But making laser pointers a household item may have ...

As even some dodgy laser pointers are being (illegally) sold online are actually Class 2, this should make it clear that laser eye injury can happen to anyone, and it only takes a second to change ...

The green beam is up to four times more visible to the human eye than the traditional red beam. And while that’s true for all interior applications, it’s especially useful in bright ambient ...

The laser beam is just one color -- the same hue as a green laser pointer -- but by activating a combination of S, M and L cone cells, it can trick the eye into seeing images in full technicolor.

A 9-year-old boy in Greece permanently injured his left eye when he repeatedly gazed into a laser pointer’s green beam, doctors say.

BALTIMORE -- A police sergeant suffered corneal damage after a laser beam was shined into their eyes while responding to a car gathering in Canton over the weekend, according to the Baltimore ...

The green laser beam thus behaves like an object, blocking the blue light and casting a dark line across the screen.

Green means go, at least to the geese at Blawnox Community Park. Mayor Tony Gross said that for whatever reason, the borough’s new green laser system meant to shoo geese is working like a ...