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Computers & Technology > Consumer Electronics (Other) Guide to Blu-ray Disc

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Blu-ray is a next generation optical disc format. Blu-ray discs are the same diameter as both CD and DVD discs, but the pits on a Blu-ray disc are a lot smaller than those on CD and DVD discs. This allows Blu-ray to hold a lot more data than those formats. Blu-ray gets its name from the blue-violet laser which is required to read the smaller pits on Blu-ray discs. DVD discs can be read by a red laser, which is less precise than a blue-violet laser. Blu-ray players, as well as being designed to play back Blu-ray discs, can also play back standard definition DVD discs (subject to region code...

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