Recent content by ncanac

The answer is essentially what has already been said. Light waves, like radio waves, are just electromagnetic radiation, classified according to their frequency (or wavelength). The general idea of transmitting information is fairly simple. You have a transmitter, which takes some signal, such...

While we're mentioning Hawking, doesn't he go on to say something to the effect of time travel and faster than light travel are essentially the same? It might not be the same concept of "time travel" you were imagining though. My memory may be wrong on this, but I thought he described it by...