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Optical Technology

 OPTICAL MEMORY 











In optical media such as CDs, DVDs, and Blu-Ray discs, pits and lands play a crucial role in representing binary information. 


    • Pits are microscopic depressions on the disc’s surface.
    • When a laser beam hits a pit, it shatters, and no reflection is received.
    • As a result, a binary 0 (O) is registered.
    • Essentially, pits correspond to the absence of data.
    • Think of pits as the valleys or low points on the disc.:
    • Lands are the flat areas between pits.
    • When a laser beam hits a land, it reflects back into a sensor.
    • This reflection registers as a binary 1 (I).
    • Lands represent the presence of data.
    • Imagine lands as the plateaus or high points on the disc.

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