HOW DOES THE DATA TRAVEL FROM THE CD TO THE LOUDSPEAKER?
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A CD player uses reflection and refraction in the convex lens which bends the light, to record and read back information.
Inside a CD player there is a small laser beam, this is called the semiconductor diode laser. The laser uses a process of refraction to read the CD, first of all it shines through a convex lens which refracts the laser so that it is well focused, becoming a focused laser beam.
Inside a CD player there is a small laser beam, this is called the semiconductor diode laser. The laser uses a process of refraction to read the CD, first of all it shines through a convex lens which refracts the laser so that it is well focused, becoming a focused laser beam.
what happens after the laser is focused?
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Then the focused laser beam, which has previously been refracted, shines on a particular place on the under side of the CD, also refracting (passing through) the first layer on the CD, this is called the poly -carbonate layer. It then uses reflection, and reflects off the aluminum layer, and hits a device which can detect changes and differences in light.
This is due to the CD's surface is covered in "bumps (pits) and lands" these are called 0's and 1's and they both reflect light differently to each other, therefore this is detected, this is called the Binary Code, and a diagram to the left helps to explain it.
This is due to the CD's surface is covered in "bumps (pits) and lands" these are called 0's and 1's and they both reflect light differently to each other, therefore this is detected, this is called the Binary Code, and a diagram to the left helps to explain it.
therefore ...
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Therefore when you press play on your CD player, the begins to cause the disk to spin and the laser starts to scan the tracks on the CD, the laser then focuses and shines onto the surface of the CD. This light is then refracted by the bumps (Pits), the light scattered and reflected by the lands.
Finally a loud speaker changes electrical energy into sound energy which you can hear, these are then played through this speaker inside the CD player.
Finally a loud speaker changes electrical energy into sound energy which you can hear, these are then played through this speaker inside the CD player.