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They use them to read CD's
CD's replaced Vinyl Records, a record player reads records by running a needle across the surface of the disc in a long spiral from the outside to the centre, this is the "track". The track has lumps and dips in it which the needle follows up and down and the player translates these movements into sound.
A CD is a digital format - the music is recorded as a code of 0's and1's like everything else digital - these are written on a CD as "pits" and "lands" which are more or less reflective (actually it is the changes between them that indicate the 0's and 1's) the laser is used to scan the disc much like the needle in a record player and detect these changes and so translate the CD to music.
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∙ 13y ago
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What things use lasers?
quite a few things. Cd players, ps3's, xbox's, computer's, anything that reads a disk really.
Where might you find laser in the home?
Alarm system
What other uses do lasers have?
Lasers have many uses, laser pointers, cd/dvd/blu-ray players and writers, Optical tweezers, Laser cooling, Communications, just to name a few.
What uses a laser?
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.
What three common things use lasers?
DVD player, CD player and a computer
How do DVD players use lasers?
The laser is used to read the data on the disc
Use of a CD player?
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.
What do you do if your cddvd drive's needle breaks off?
CD and DVD drives don't use needles, they use lasers
How players reading data from Blu-ray?
Blu-Ray players use lasers to read and collect the data from the disc.
What is a class 1 laser?
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.
How does a CD drive read a CD?
the CD drive has lasers which read the CD, so the CD has pieces that can be read.
Are any portable CD players made for use while fishing?
no - I did not find any water proof cd players
