And High Definition (1080 pixels) quality movie of two to three hours is of 8-15 gigabytes. Let’s keep that an average high definition is 10 GB, so that if 40,000 movies are to be stored then the required memory capacity is about 400,000 GB which is about 400 Terabytes.
Dr. Zongsong Gan and his team at Swinburne University of Technology claimed that they have found out a method to store 1,000 terabytes of data on a single DVD, and they were recently awarded a Victoria Fellowship for this wonderful work.
DVD’s are optical disc which write data by refracting light into it, the smallest light beam used in optical drives is 405 nanometre for Blu-ray HD videos. Light can be broken up to 500 nanometres. Zongsong and his team figured out that if we can use two light beams then they can shorten the optical writing light down to just 9 nanometres. And they did it; they used 2 different lights and reduced the refracted writing rate to 9 nanometres. By which the capacity could be increased by 5555.56 percent! Which is amazing?
One beam is used for writing data and the other beam is used to block all other beam and allow only the beam of 9 nanometre length. This technology is so obvious that it was possible to store 40,000 HD movies on a single DVD, which had capacity 4.7 gigabytes before.
“Putting so much information on a single disc makes it easier for people to destroy huge amounts of data and thus cost more to protect the disc” says Dr. Gan. “Also, we are now working to speed up for data reading and recording. If we’re still using the current DVD speed, how long it will take to write 1,000 TB of data onto a disc?”
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