(Source: thekmr, via thats-so-meme)
The “Slide To Unlock” doormat is a great way to inform burglars that your house is full of Apple products.
Cherenkov radiation is electromagnetic radiation emitted when a charged particle (such as an electron) passes through a dielectric medium at a speed greater than the phase velocity of light in that medium.
Basically it’s like a sonic boom but for light. Like when a charged particle moves faster than the speed of light in a local medium (e.g. light is 15 percent slower in water)
(via likeaphysicist)