The picture tube of a black and white T. V. the set has only one electron gun that produces the picture on its screen. The number of electron guns, a colour picture tube has, is:
The picture tube of a black and white T. V. the set has only one electron gun that produces the picture on its screen. The number of electron guns, a colour picture tube has, is:
Explanation
In a colour-television tube, three electron guns (red, green, and blue) fire electrons toward the phosphor-coated screen.