SBA99 BONUS: Since the Electrical Contacts are Exposed

SBA99 BONUS This compound is normally reflective, but when the laser focuses on a spot and heats it to a certain temperature, it "burns" the dye, causing it to darken. To do all of this, the CD player has to be exceptionally precise when it focuses the laser on the track of bumps. MO uses a laser to heat the surface of the media. Once the surface reaches a particular temperature, a magnetic head moves across the media, changing the polarity of the particles as needed. This particular compound has an amazing property: When heated to one temperature, it crystallizes as it cools and becomes very reflective; when heated to another, higher temperature, the compound does not crystallize when it cools and so becomes dull in appearance. That's where CD-recordable (CD-R) and CD-rewritable (CD-RW) come in. Other optical devices that deviate from the CD standard, such as DVD, employ approaches comparable to CD-R and CD-RW.|You May have used other Words