The CD ROMTrue or False

(Starter)

The CD ROM

True or False

A CD ROM disk stores it’s data on a track in a spiral formation. If you were to unravel this track and put it in a straight line, it would be 0.5 microns wide and 3.5 miles in length.

True

1

http://electronics.howstuffworks.com/cd3.htm

The CD ROM

True or False

A CD ROM disk rotates at more than 23,000rpm when data is being read from it, though writing speeds are not as fast.

False

2

A CD ROM rotates at around 200-500rpm. A CD ROM disk rotating at this speed would explode and break up.

http://electronics.howstuffworks.com/cd4.htm

The CD ROM

True or False

Is this description of the working of a CD ROM true:‘The laser beam passes through the polycarbonate layer, reflects off the aluminum layer and hits an opto-electronic device that detects changes in light.’

3

http://electronics.howstuffworks.com/cd5.htm

True

The CD ROM

True or False

The maximum capacity of a CD is 400MB

4

False

Commonly CDs store up to 700MB of data

The CD ROM

True or False

If you spill a coffee over a CD, will it ruin the data?

5

False

Not usually, you will normally be able to wipe it off.

http://www.factscolumn.com/interesting-facts-about-cds.html

The CD ROM

True or False

CDs are made almost completely of aluminium with a glass face.

5

False

CDs are 1.2mm thick and mostly contain polycarbonate with a layer of aluminium in them.

http://www.factscolumn.com/interesting-facts-about-cds.html