How does a laser printer's operation differ from that of a dot matrix printer?

A dot matrix printer moves a print head containing a matrix of pins over the paper. A pattern of pins matching the character or symbol to be printed is forced out of the print head, generating printed images and characters.
A laser printer operates with an electrical charge applied to a rotating metal drum and the attraction of ink to this charge.The print driver reads pixel values from the buffer and modulates a tightly focused laser over the drum's width. The laser removes the charge wherever it shines on the drum. The drum contains an image of the page, with charged areas representing black pixels and uncharged areas representing white pixels. The drum then passes a station where fine particles of toner are attracted to the charged areas. As paper passes over the drum surface, toner on the drum is attracted to the paper because of its higher charge. The paper and attached toner are fed through heated rollers that fuse the toner to the paper surface