Lightspeed travel is a popular concept in sci-fi and pop culture, but it's not a technology we are likely to see anytime soon ...

Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

The theory of special relativity is rife with counterintuitive and surprising effects, the most famous of which are length ...

Last week Elon Musk said in one of his 100-plus daily tweets that “This is just a very basic first step. Earth and Mars will ultimately need greater than petabit/sec connectivity.” Petabit/second ...

There are a number of ways to measure the speed of light. If you’ve got an oscilloscope and a few spare parts, you can build your own apparatus for just a few bucks. Don’t believe the “lies ...

Snell’s Law explains light refraction at material boundaries, a principle crucial to fiber optics, lens design, and advanced ...

Simulation Video of Light Travelling From New York to Back in Less Than a Second Amazes Viewers The motion of light is tough ...

In special relativity, the speed of light is the ultimate speed limit to the universe. Every single moving object in the universe is constrained by that fundamental limit. This isn’t something like ...

A series of new animations by a NASA scientist show just how zippy - and also torturously slow - the speed of light can be. Light-speed is the fastest that any material object can travel through ...

The speed of one knot was particularly remarkable. In fact, it appeared to be moving faster than the speed of light because ...

Blinkies” used to be how couponers would fondly refer to automatic coupon dispensers at the shelf, with a blinking red light ...