Breaking the speed of light from your backyard
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Full Video: https://www.youtube.com/watch?v=lR4tJr7sMPM You may have heard that Einstein's theory of special relativity imposes a cosmic speed limit: nothing can travel faster than the speed of light. Well, that's wrong. All that Einstein said was that light moves at the same speed in every reference frame - and while this implies that nothing with real mass can move faster than light, it doesn't impose a cosmic speed limit. Because you can break the speed of light in your backyard. All you have to do is point a laser beam at the moon and flick your wrist. The spot of light from the laser beam will travel across the moon's face in about half a millisecond, which means it's traveling at twenty times the speed of light! How is this possible? Well, think about a computer screen – what's the speed limit for pixels on the screen? Zero. Pixels can't move. But if you cleverly arrange a whole bunch of pixels to turn on and off in a special way, you can make an image that appears to move across
Tags: physics, minutephysics, science
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