Blu-ray technology to replace DVD what is

What is Blu-ray? Blu-ray or Blu-ray Disc (BD) is the name of a new standard technology for optical disks. Was developed to record high-definition video. High-Definition Video (HD) or more data files than DVD, the source of the name Blu-ray is derived from the use of blue-violet laser. To read and write a disc. Instead of using a red laser like the DVD, the blue-violet laser has a wavelength of 405 nm that is shorter than a red laser with a wavelength of 650 nm, allowing more data to be recorded onto the disc. same Blu-ray capacity Normal Blu-ray discs are similar to one-sided and two-sided CD / DVD discs, each of which can hold up to two layers. BD-R (SL) refers to a single-layer single layer Blu-Ray Disc with 25 GB capacity. BD-R (DL) refers to a double-layer Blu-Ray Disc with a capacity of 50 GB. BD-R (2DL) refers to a double-layer double-layer Blu-Ray Disc with a capacity of 100 GB. The speed of reading or recording Blu-Ray discs with 1x, 2x, 4x in each 1x will be 36 megabytes per second, which means that 4x can record data up to 144 megabits per second.