So how can we hear a CD through a loud speaker?
There is a small laser beam inside the CD player it is also known as a Semiconductor diode laser. There is also an electric light detector also known as a photoelectric cell. When the play button is hit the disc rotates quickly because of the electric motor. As the play button is hit the laser beam switches on and starts to scan the track. The electric motor is what slows the disc down whilst the laser beam scans the centre of the disc to the outside of the disc.
The laser beam then flashes onto the bottom of the CD, which is the shiny side. This beam bounces off the bumps and then lands on the flat area of the disc. The flat part of the disc reflects the laser beam and the bumps scatter the light everywhere.
When the light is reflected, the photocell recognises it; it then sends a burst of electric currents to the electric circuit in the CD player. When the light does not reflect back the photocell cannot detect anything, therefore the electric circuit goes back to zero. Meaning the laser beam and electronic circuit reproduces the pattern of numbers using binary digits (zero and ones).
There is also another electronic circuit in the CD player which is called a digital. This changes the binary numbers and converts them into patterns of electronic currents.
a loudspeaker coverts all of the patterns of electronic patterns into louder sounds these are then sent to the ear, this is because the electric energy is turned into sound energy.
There is a small laser beam inside the CD player it is also known as a Semiconductor diode laser. There is also an electric light detector also known as a photoelectric cell. When the play button is hit the disc rotates quickly because of the electric motor. As the play button is hit the laser beam switches on and starts to scan the track. The electric motor is what slows the disc down whilst the laser beam scans the centre of the disc to the outside of the disc.
The laser beam then flashes onto the bottom of the CD, which is the shiny side. This beam bounces off the bumps and then lands on the flat area of the disc. The flat part of the disc reflects the laser beam and the bumps scatter the light everywhere.
When the light is reflected, the photocell recognises it; it then sends a burst of electric currents to the electric circuit in the CD player. When the light does not reflect back the photocell cannot detect anything, therefore the electric circuit goes back to zero. Meaning the laser beam and electronic circuit reproduces the pattern of numbers using binary digits (zero and ones).
There is also another electronic circuit in the CD player which is called a digital. This changes the binary numbers and converts them into patterns of electronic currents.
a loudspeaker coverts all of the patterns of electronic patterns into louder sounds these are then sent to the ear, this is because the electric energy is turned into sound energy.