Q:

What are the differences between CDs and DVDs?

A:

The differences between CDs and DVDs are data density and disc construction. A standard DVD holds 4.7 gigabytes of data, whereas a standard CD holds 700 megabytes of data.

The data on CDs and DVDs is recorded in a spiral that starts at the center of the disc. DVDs hold more data because they have a longer spiral on which to record data. This is made possible through the use of a narrower laser.

CDs are made from a single layer of polycarbonate with an aluminum recording layer on the top of the disc. DVDs are made from two thin layers of polycarbonate with an aluminum recording layer between the polycarbonate layers.


Is this answer helpful?

Similar Questions

  • Q:

    How much do 100 CDs weigh?

    A:

    Determining the weight of 100 CDs depends on whether only the CDs are weighed or if the CDs have sleeves or jewel cases. A single CD by itself weighs about 0.58 ounces. Therefore, 100 CDs by themselves weigh 58 ounces.

    Full Answer >
    Filed Under:
  • Q:

    What is Galavision?

    A:

    Galavision is a Spanish-language channel aimed at Latin Americans living within the U.S. According to DISH, it is the number-one Spanish-language cable network in the country, and as of August 2013, over 68 million or nearly 60 percent, of U.S. households with television have access to the channel.

    Full Answer >
    Filed Under:
  • Q:

    How is the television made?

    A:

    How the pictures on a television are made depends on what kind of technology it uses, but they all take advantage of the human brain's capacity to assemble a coherent scene out of tiny colored dots called pixels. The three most common technologies used to transmit these pixels are the cathode ray tube, liquid crystal display and plasma display, according to HowStuffWorks.

    Full Answer >
    Filed Under:
  • Q:

    Why does Carrie call him "Mr. Big"?

    A:

    Carrie Bradshaw on "Sex and the City" called her sometimes-boyfriend and eventual husband Mr. Big because she and her friends thought he lived a big life with his career and personal activities. He frequently spent big amounts of money, dated a number of women and lived in a large New York City apartment.

    Full Answer >
    Filed Under:

Explore