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Blu-ray players are backwards compatible with DVD and CD formats.
a. True
b. False

User OriolJ
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1 Answer

4 votes

Final answer:

Blu-ray players are true to backward compatibility with DVDs and CDs, using both blue and red lasers to read discs with various pit sizes, enabling them to store and read more dense data than CDs.

Step-by-step explanation:

Blu-ray players are backward compatible with DVD and CD formats, so the statement is true. This is because Blu-ray players are designed to also read the larger pits and bumps of DVDs and CDs using a red laser in addition to the blue laser they primarily use. A Blu-ray player is able to read more information than a CD player because it uses a blue laser with a shorter wavelength (405 nm), which allows it to resolve the smaller and more closely packed pits on a Blu-ray disc. Blu-ray discs have a higher storage density due to these smaller pits, which are more than twice as small as the pits on a DVD or CD. Additionally, Blu-ray discs store data on a polycarbonate layer closer to the lens and use a hard coating to protect this data, making it less prone to readability issues compared to CDs.

User Johan Willfred
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