Starter The CD ROM True or False A CD ROM disk stores its 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 05 microns wide and 35 miles in length ID: 639271
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Slide1
The CD ROM
True or False
(Starter)Slide2
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.htmSlide3
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.htmSlide4
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
TrueSlide5
The CD ROM
True or False
The maximum capacity of a CD is 400MB
4
False
Commonly CDs store up to 700MB of dataSlide6
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.htmlSlide7
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