Dual layer DVDs

What is a Bit?


A Bit is a binary digit that forms the basic form of digital information storage being either a 0 or a 1.

On a CD or DVD the Bit is represented by 'pits' and 'grounds' (the normal flat metallic surface of the disc without any holes burnt or punched out of it) with a transition between a pit and ground being a 1 and a continuous spell within a pit or a ground being a 0.

On a tape or had disc the same principle to a CD applies, but the pits and grooves are represented magnetically.

There are 8 Bits in a Byte, 1024 Bytes in a Kilobyte (KB), 1024 KiloBytes in a MegaByte (MB), 1024 MegaBytes in a GigaByte (GB) and 1024 GigaBytes in a TeraByte (TB).

 

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