Which printer uses a combination of laser-beam & electro photographic techniques?
Which printer uses a combination of laser-beam & electro photographic techniques?
The correct option is C Laser printers
Laser printers uses a combination of laser-beam &
electro photographic techniques.
Laser printer, a computer printer that produces
high-resolution output by means of a process that is similar to photocopying.
In place of reflected light from an image (as is used in xerography), a laser
printer uses data sent from a computer to turn a laser beam on and off rapidly
as it scans a charged drum. The drum then attracts toner powder to the areas
not exposed to the light. Finally, the toner is fused to paper over a belt by
heated rollers. In a write-black printer the laser positively charges the
printed areas to attract the toner, which gives better detail than a
write-white printer. In a write-white printer, the beam negatively charges the
areas not to be printed to repel the toner, which gives a denser image. Faster,
quieter, and capable of producing more attractive results than standard
printers, laser printers have become an important means of printing business
documents since they became more generally available (1984) for personal
computers. See also desktop publishing.
The prediction that the computer would create a paperless
office could not have been further from reality. More paper is being consumed
as computer printing has become available to the masses. In fact, computers
have created a new category of computing—desktop publishing—that produces
printed paper of near-publication quality.
Laser printers uses a combination of laser-beam & electro photographic techniques.
Laser printer, a computer printer that produces high-resolution output by means of a process that is similar to photocopying. In place of reflected light from an image (as is used in xerography), a laser printer uses data sent from a computer to turn a laser beam on and off rapidly as it scans a charged drum. The drum then attracts toner powder to the areas not exposed to the light. Finally, the toner is fused to paper over a belt by heated rollers. In a write-black printer the laser positively charges the printed areas to attract the toner, which gives better detail than a write-white printer. In a write-white printer, the beam negatively charges the areas not to be printed to repel the toner, which gives a denser image. Faster, quieter, and capable of producing more attractive results than standard printers, laser printers have become an important means of printing business documents since they became more generally available (1984) for personal computers. See also desktop publishing.
The prediction that the computer would create a paperless office could not have been further from reality. More paper is being consumed as computer printing has become available to the masses. In fact, computers have created a new category of computing—desktop publishing—that produces printed paper of near-publication quality.
