Optical storage and its properties

Question 1

How is each 1 and 0 represented in optical storage?

Answer 1

1 is represented as a hole (pit) and 0 is represented as a flat surface (land).

Question 2

How is data read on optical storage?

Answer 2

A laser is shone on the surface.

• If it hits land then it will hit a sensor
• If it hits pit then it will reflect elsewhere
• Used to represent 1 and 0.

Question 3

What is optical media used to deliver.

Answer 3

Multimedia content like videos.

Question 4

What are the features of optical media?

Answer 4

• Great reliability (shock and water proof)
• Portable
• Low cost
• Slow read write speeds because of moving parts
• Low capacity per disk

Question 5

Is it quicker to write data or read data on optical storage?

Answer 5

read data