Explain the function of each of the following parts of a cathode-ray tube
i. aquadag layer
ii. screen
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Explain the function of each of the following parts of a cathode-ray tube
i. aquadag layer
ii. screen
i. Aquadag layer:
The aquadag layer is a layer of conductive material that is applied to the inside surface of the faceplate of a cathode-ray tube. It serves as the cathode of the tube and is responsible for emitting electrons when heated by the filament. The aquadag layer is typically made of a conductive material, such as graphite, that is suspended in a binder.
ii. Screen:
The screen is the part of a cathode-ray tube that is used to display the image or information being transmitted. It consists of a layer of phosphor material that is coated on the inside surface of the faceplate of the tube. When the cathode emits electrons and they strike the screen, they cause the phosphor material to emit light, which creates the image or information being displayed. The screen is typically made of a phosphor material that is chosen based on the desired color and brightness of the image being displayed.