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Can a hard disk involve the use of a laser beam to read data from a disk surface?
Wiki User
∙ 11y ago
yes
Wiki User
∙ 11y ago
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Is laser beam used in RAM CHIP to store data?
No, RAM is a form of computer memory that is an integrated circuit, which uses electricity to read and write data. A laser beam IS used in CD/DVD drives though, where the laser detects differences in distance from tiny pits on the surface of the disc representing data.
A beam of light used to record and retrieve data on optical disks is known as?
laser
How is data read from a CD-RW?
Any kind of data are stored on surface of CD or DVD in binary code ( 0100101010101) which is lot of zeros and ones. When this data are "burned" on surface of CD or DVD laser burns holes into it. The holes represents "1" and the empty space between represents "0" . So when laser reads surface of CD it basically translating binary code into your music, film or anything else what you stored.
Which side of a DVD plays?
Well, neither of them "plays" but I still get the question. The data is actually on a thin metal like surface in the center. A laser beam detects nothing more than pits. Like 100111000111001000 CPU language. Either there is a pit or not. This happens when the light from the laser beam is bounced off the "bottom" of the disc.
Which storage device uses laser beams to read and write?
Laser beams are used to read and write data on CDs and DVDs. Apart from writing on these disks, the laser beam can also be used to erase the data stored or even overwrite the data stored with fresh data depending on the type of disk used.
What is burning of CD?
Burning of a CD means that you laser write data onto the silver surface of the CD.
Is modulation needed for digital data transmission?
Modulation is only required if the data is being sent over a radio wave, or a laser beam. And even in the case of a laser, if you are content with on/off data streams, then there is no underlying signal to be modulated. Essentially all of the data whizzing round in your computer is doing so without the benefit(?) of a carrier - the wires are sufficient.
How does a DVD drive work?
A DVD drive uses a laser and an optical lens to read the surface of the disc itself, which contains several pits that contain data. If the laser hits pits, it is a 1. If not, it is a 0. The laser, containing data, comes back from the mirrored disc surface and into the optical lens, reading the information and therefore changing it into graphics, audio, and useful information.
Two characteristics give a DVD more storage than a CD?
The DVD uses a different laser with a smaller wavelength, not the long wavelength red laser that is used for CD's. I believe the DVD laser is in the ultraviolet spectrum. Anywho, the smaller laser allows the DVD to have smaller "bumps" (which is what the laser reads). Since they are smaller, more can fit onto a disk. Also, DVD's can be 2-layer. Twice the data.
How do CD players use light?
CD players use light to read CD's. The data side of a CD is basically a giant mirror for a particular frequency of laser, except it has all these pits in it. Basically, the drive shines a laser beam at the disk, and if it hits a flat part, it bounces back, and if it hits a pit, it bounces somewhere else. Depending on where the light beam comes back, the CD drive figures out what data was encoded on the CD.
What is a pitpit?
The recessed area on a CD or DVD where data is stored. CDs and DVDs store data in lands and pits. The lands represent 1 and the pits represent 0 in binary computing. The bits are read by the disc drive that uses a laser beam to distinguish between the lands and pits based on the amount of scattering or deflection that occurs when the beam of light hits the surface of the disc
Polycarbonate discs coated with a reflective metal on which data is recorded using laser technology as a trail of tiny pits or dark spots in the surface of the disc are?
magnetic storage
