1. WELCOME

3. 1 GENERATION: Compact Disc (CD) :- capacity 650/700MB Wave length of laser which reads data : 780nm Colour of laser : Red HISTORY

4. 2 GENERATION: Digital Versatile Disc (DVD) :- capacity 4.7GB Wavelength of laser which reads data : 650nm Colour of laser : Red

5. 3 GENERATION: Blu ray Disc (BD) :- capacity 25/50 GB wavelength of laser which reads data : 405 nm colour of laser : Blue- violet which was developed in 1996 by SHUJI NAKAMURA at NICHIA CORPORATION

6. THE NAME The Blu ray name is a combination of “ Blue ” for the colour of the laser is used and the “ ray ” for optical ray .

7. TYPES OF BD SINGLE LAYER: Can hold data upto 25/27 GB that means 2hrs of HD video or about 13hrs of standard video. DOUBLE LAYER: Can hold data upto 50GB that means 4.5hrs of HD video or more than 20hrs of standard video.

13. BDA :(Blu ray Disc Association) This association develops and licences Blu ray Disc technology. (in 2002)

14. Blu ray Movies

17. PRESENTED BY: CHRISTINE JOSE K MCA Department Vidya Academy of Science and Techonology Thalakkottukara P.O, Thrissur, Kerala, India, Pin:680 501.

18. THANK YOU……