#speed-of-light

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#special-relativity
fromBig Think
1 week ago
Science

Mass misconception: The real reason we can't outpace light speed

Objects with non-zero mass cannot reach the speed of light because approaching it would require infinite energy, making faster-than-light travel impossible.
fromWIRED
1 month ago
Science

Einstein Showed That Time Is Relative. But ... Why Is It?

Both the driver and the observer see light traveling at speed c, illustrating the principles of special relativity.
more#special-relativity
fromwww.scientificamerican.com
1 week ago

How to See Faster-Than-Light Motion

The joke is that the speed of light really is a cosmic law; to the best of our understanding, nothing can travel faster than light. Generations of Star Trek notwithstanding, this restriction isn't just some engineering limit, like the way the speed of sound used to be unsurpassable for airplanes (the phrase sound barrier was popular in sci-fi movies when I was a kid). The speed of light is the ultimate physical speed limit, a parameter woven into the fabric of the universe itself.
Science
fromBig Think
3 weeks ago

Does the Universe expand faster than the speed of light?

Nothing can exceed the ultimate speed limit set by the laws of physics, known as the speed of light in a vacuum, or 299,792,458 m/s.
Science
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