While a laser pointer's distance is influenced by many factors, including atmospheric conditions, you might be surprised to ...

When I was a kid working summers on my grandfather’s farm, I helped him replace rotten wood posts along a mile or so of barbed-wire fencing. Grandpa Bud would squint through the scope of his (empty, I ...

A laser pointer's beam can reach miles into the sky, yet its bright dot seems to vanish on your TV. Here's what's actually ...

The first thing to understand is that our eyes don't see every color equally. During the day, human vision is naturally most sensitive to green light. A wavelength of 532 nanometers (nm) sits very ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...