difference between blu-ray and dvd
Blu ray and dvd are both optical discs. Nearly identical in size, blu ray discs and dvdâs have remarkably different storage capacities. A single layer dvd disc can hold approximately 4.7 gigabytes of data while a single layer blu ray disc of basically the same size can hold approximately 27 gigabytes of data.
Where DVDs use a red laser to read the optical disc, the Blu ray disc uses a blue laser that has a shorter wavelength than a red light and therefore has the ability to store a larger amount of data. Another major difference lies in the DVD playersâ and Blu ray disc playersâ ability to play both kinds of optical discs.
The major difference as pointed out before is the additional capacity that a Blu Ray disc holds compared to a DVD. A Blu ray discs holds 5 to 10 times the memory than a DVD can. Also, the experience of watching a Blu Ray disc video in high definition is unmatched by DVDsâ video quality. About 23 hours of standard-definition (SD) video and over 9 hours of high-definition (HD) video can be stored on a 50GB disc. Another important distinction is in the playing format.