Alarm system
There are a great many devices in the world that use lasers. Computer mice for example might use lasers to operate efficiently.
Optical data vdrives in computers and home entertainment, such as DVD and CD players / recorders. Lasers are used to make light shows. Lasers are also used in precision cutting machines.
The laser is used to read the data on the disc
A CD player is used to play music from a CD. There are personal CD players that are used with headphones and CD players that are part of a stereo system.
CD and DVD drives don't use needles, they use lasers
Blu-Ray players use lasers to read and collect the data from the disc.
the CD drive has lasers which read the CD, so the CD has pieces that can be read.
no - I did not find any water proof cd players
A class 1 laser - is '...safe under all conditions of normal use...' This means it's okay to view the beam with the naked eye (although not recommended !). Class 1 lasers are found in such devices as CD players & DVD players.
it depends. there are many CD players now, including boom boxes, that can play, mp3, mp4, and wma formats. most CD players use wma formats though
Optical lasers, also known as laser optics, are beams of light that come in many different strengths and possible uses. Modern computer mice use lasers to detect movement. Video game systems and DVD players use lasers to access discs. More powerful lasers are used for surgery and in laboratories as tools for experiments.