Friday, November 28, 2014

A LIttle Einstein in Your Day

There's a very cool article over at Live Science that shows eight ways in which Albert Einstein's incredible Theory of Relativity impacts your day-to-day existence.  From the article, a brief intro and then item 1 in their list of 8:
But you don't necessarily need a spaceship zooming at near the speed of light to see relativistic effects. In fact, there are several instances of relativity that we can see in our daily lives, and even technologies we use today that demonstrate that Einstein was right. Here are some ways we see relativity in action.
Global Positioning SystemIn order for your car's GPS navigation to function as accurately as it does, satellites have to take relativistic effects into account. This is because even though satellites aren't moving at anything close to the speed of light, they are still going pretty fast. The satellites are also sending signals to ground stations on Earth. These stations (and the GPS unit in your car) are all experiencing higher accelerations due to gravity than the satellites in orbit.