NO LAB
Today we have an interesting DEMO that how an oscilloscope works.
On the oscilloscope, the screen is connected to a tube that is far back.
Inside the oscilloscope includes an electron gun. It contains wires and when we apply a voltage across it, the wire gets hot and emits electron in all directions. When we apply source with high intensity, some of the charges bounce around, some of the charges get absorbed, and some of the charges get shoot out the tiny hole and becomes electronic beams. The monitor projects the motion and position of the electronic beams. In the tunnel, we have a positive charged plate on top, and negative charged plate on the bottom, positive charged on the left, and negative charged on the right. When we apply voltage on the circuit, we can see the beam on the display screen.
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