To answer the question, we need to identify the type of printer that uses a laser beam to print images on paper. Let's break down the options and determine the correct answer:
A: Laser
- Laser printers use a laser beam to create an electrostatic image on a drum or belt, which is then transferred to the paper.
- The laser beam scans across the drum or belt, selectively charging areas to create the image.
- Toner, a fine powder, is attracted to the charged areas, and then fused onto the paper using heat.
- Laser printers are known for their high-quality prints, fast speeds, and precise output.
B: Dot matrix
- Dot matrix printers use a matrix of small pins to strike an inked ribbon against the paper, creating characters and images.
- They work by forming dots with the inked ribbon, which combine to create the desired image.
- Dot matrix printers are typically slower and produce lower resolution prints compared to laser printers.
C: InkJet
- Inkjet printers spray tiny droplets of ink onto the paper to create images and text.
- They work by propelling the ink through a series of nozzles onto the paper, forming the desired image.
- Inkjet printers are versatile, capable of printing high-quality photos and documents, but they are generally slower than laser printers.
D: All of these
- This option suggests that all three types of printers (laser, dot matrix, and inkjet) use laser beams to print images on paper.
- However, this is incorrect. Only laser printers use laser beams for printing.
Therefore, the correct answer is A: Laser. Laser printers use a laser beam to print images on paper by creating an electrostatic image on a drum or belt, attracting toner, and then fusing it onto the paper using heat.