on a flat screen with us in touch associate professor department of nuclear physics of the faculty of physics of belgos state universityy sergeevich good afternoon. explain to us the magic of television. hello ekaterina. thank you for such a question. it implies a very interesting detailed the answer is that the most important thing in a classic primitive cathode ray tube, or as it is also called a kinescope, we have a certain screen, which is a glass coated with a phosphor phosphor. in this case, this substance is ordinary gray or white, which, starting to glow in the place where the electron beam hits, in order to organize this beam , a special device is created that emits our electrons, and then with the help of special electrical systems. we can change the motion of this beam, and it can hit or here or here, anywhere, that is, if we apply a certain voltage to the beam, it will simply run around the screen and draw lines. well from this. before the tv , we will modulate one step, that is , change the intensity of this beam and the glow will be different, that is, brighter darker. in addition, we can move it not only