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A small plastic disc used for the storage of digital data, originally developed for audio system. What it is called?
- a)Compact disc
- b)Floppy disk
- c)Optical disc
- d)Zip disk
Correct answer is option 'A'. Can you explain this answer?
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A small plastic disc used for the storage of digital data, originally ...
A. Compact disc
A compact disc, also known as a CD, is a small plastic disc used for the storage of digital data. It was originally developed for audio systems, but is now widely used for various purposes including music, software, and data storage.
Development
The compact disc was developed in the late 1970s and early 1980s by a collaboration of Philips and Sony. The goal was to create a durable and reliable medium for storing audio recordings with high sound quality.
Physical Characteristics
A compact disc is a circular disc made of polycarbonate plastic. It measures 120 millimeters in diameter and has a thickness of 1.2 millimeters. The disc is coated with a thin layer of aluminum, which is then covered with a protective layer of acrylic.
Digital Data Storage
The digital data on a compact disc is stored in the form of tiny pits and lands on the surface of the disc. These pits and lands represent the 0s and 1s of binary code.
Reading and Playback
To read the data from a compact disc, a laser beam is directed onto the surface of the disc. The laser reflects differently off the pits and lands, and this reflection is detected by a photodiode. The detected signals are then converted into digital data, which can be decoded and played back as audio or accessed as other types of data.
Advantages and Disadvantages
Compact discs offer several advantages over other storage mediums. They have a large storage capacity, are durable, and have a long lifespan if properly cared for. However, they can be easily scratched or damaged if mishandled. Additionally, they are becoming less popular with the rise of digital streaming and cloud storage options.
In conclusion, a compact disc is a small plastic disc used for the storage of digital data. It was originally developed for audio systems and has since been used for various purposes.
A compact disc, also known as a CD, is a small plastic disc used for the storage of digital data. It was originally developed for audio systems, but is now widely used for various purposes including music, software, and data storage.
Development
The compact disc was developed in the late 1970s and early 1980s by a collaboration of Philips and Sony. The goal was to create a durable and reliable medium for storing audio recordings with high sound quality.
Physical Characteristics
A compact disc is a circular disc made of polycarbonate plastic. It measures 120 millimeters in diameter and has a thickness of 1.2 millimeters. The disc is coated with a thin layer of aluminum, which is then covered with a protective layer of acrylic.
Digital Data Storage
The digital data on a compact disc is stored in the form of tiny pits and lands on the surface of the disc. These pits and lands represent the 0s and 1s of binary code.
Reading and Playback
To read the data from a compact disc, a laser beam is directed onto the surface of the disc. The laser reflects differently off the pits and lands, and this reflection is detected by a photodiode. The detected signals are then converted into digital data, which can be decoded and played back as audio or accessed as other types of data.
Advantages and Disadvantages
Compact discs offer several advantages over other storage mediums. They have a large storage capacity, are durable, and have a long lifespan if properly cared for. However, they can be easily scratched or damaged if mishandled. Additionally, they are becoming less popular with the rise of digital streaming and cloud storage options.
In conclusion, a compact disc is a small plastic disc used for the storage of digital data. It was originally developed for audio systems and has since been used for various purposes.
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A small plastic disc used for the storage of digital data, originally developed for audio system. What it is called?a)Compact discb)Floppy diskc)Optical discd)Zip diskCorrect answer is option 'A'. Can you explain this answer?
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