In an assembly of an optical data storage product, there is a 0.83 percent chance of a successful optical alignment. How many trials on average are required to get the first successful alignment. If the likelihood of success is p for each trial, then the likelihood that the kth try will result in success is
P(X=k)=(1−p)^(k−1)p
Data that is stored on a medium that can be read optically is called optical storage. With the help of light—typically a laser beam precisely focused on a rotating optical disc—data is captured by generating markings in a pattern that can be read back. Microform is a more traditional type of optical storage that doesn't require a computer to operate. Additionally, new techniques are being developed for optical data storage. A computer's optical disc drive is a component that can read optical discs like DVDs and Blu-ray discs as well as CD-ROMs. When compared to other methods of data storage, such as those used by floppy discs, hard discs, and semiconductors, optical storage is different.
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