Which of the following contains a laser?

Correct option is A

A CD Drive contains a laser that is used to read and write data on optical discs, such as CDs, DVDs, or Blu-rays. The laser beam reflects off the disc surface to interpret the data stored on it.
Important Key Points:
1. CD Drive utilizes a laser diode to read and write data on optical storage media.
2. The laser in the CD Drive is crucial for detecting the pits and lands on the disc surface, which represent binary data.
3. RAM and Hard Disk Drives do not contain lasers, as they use entirely different technologies for data storage and retrieval.
Knowledge Booster:
• RAM: Random Access Memory is a volatile memory type and does not involve lasers. It is used for temporary data storage.
• Hard Disk Drive: Uses magnetic platters and a mechanical read/write head, not lasers, for data storage and retrieval.