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Storage media such as a CD read and write information using __________
- a)a laser beam of red light
- b)magnetic dots
- c)magnetic strips
- d)All of these
- e)None of these
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Storage media such as a CD read and write information using __________...
Storage media such as a CD read and write information using a laser beam of red light.
Most Upvoted Answer
Storage media such as a CD read and write information using __________...
CDs use a laser beam of red light to read and write information.
Explanation:
CDs (compact discs) are a type of optical storage media that use a laser beam to read and write information. This technology is based on the principle of reflecting light off a disc's surface to encode and retrieve data. When a CD is written, a laser beam is used to burn microscopic pits onto the disc's surface, which represent digital information. To read the data, a laser beam is again used to reflect off the surface of the disc and detect the changes in reflection caused by the pits.
Some key points to note about CDs and lasers:
- CDs use a laser beam of red light specifically, with a wavelength of 780 nanometers.
- The laser beam is focused by a lens onto the disc's surface, allowing for precise reading and writing of data.
- The laser beam is emitted by a laser diode, a small semiconductor device that generates coherent light.
- The speed of the laser beam determines the read and write speeds of the CD, with faster speeds allowing for more data to be transferred in a shorter time.
In summary, CDs use a laser beam of red light to read and write information, making them a type of optical storage media.
Explanation:
CDs (compact discs) are a type of optical storage media that use a laser beam to read and write information. This technology is based on the principle of reflecting light off a disc's surface to encode and retrieve data. When a CD is written, a laser beam is used to burn microscopic pits onto the disc's surface, which represent digital information. To read the data, a laser beam is again used to reflect off the surface of the disc and detect the changes in reflection caused by the pits.
Some key points to note about CDs and lasers:
- CDs use a laser beam of red light specifically, with a wavelength of 780 nanometers.
- The laser beam is focused by a lens onto the disc's surface, allowing for precise reading and writing of data.
- The laser beam is emitted by a laser diode, a small semiconductor device that generates coherent light.
- The speed of the laser beam determines the read and write speeds of the CD, with faster speeds allowing for more data to be transferred in a shorter time.
In summary, CDs use a laser beam of red light to read and write information, making them a type of optical storage media.
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Storage media such as a CD read and write information using __________a)a laser beam of red lightb)magnetic dotsc)magnetic stripsd)All of thesee)None of theseCorrect answer is option 'A'. Can you explain this answer?
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