Task id16684
The control electrodes of the cathode ray tube are two flat parallel plates with a length of l = 2 cm. The distance from the control electrodes to the tube screen is L = 30 cm. Parallel to the control electrodes in the middle, an electron beam flies between them with a speed v0 = 2 107 m/s . What is the electric field strength between the electrodes that causes a displacement of the electron beam on the screen by a distance d=12 cm?
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