What is the difference between bluetooth and blu ray?

Answer 1

Bluetooth is the standardised radio system, devised to add devices wirelessly to mobile phones and computers. Such as cordless headphones and ear pieces for hands free. It was called 'Bluetooth' after King Harald Bluetooth, a viking who managed to get the the other Scandinavian tribes to talk to each other. The pioneers of the system were Ericsson and Nokia, both scandinavian mobile phone companies.

Blue ray is a high definition form of DVD. It compacts more data onto a DVD in order to use Hi def TV's. Called blueray, because the higher frequency laser used to read the disk, gives out a blue light, instead of red. Although the disks look the same, they are different than standard DVDs. You need Blueray players and disks, in order to use the system. Blueray players are backward compatible with standard DVDs, you can play standard DVDs on them, but with no improvement of picture quality.