Hewwo someone help me Activity 13. Reinforcement. Take notes.
Read the following text and make a note taking as indicated.
a) Identify main ideas.
b) Use your own words to explain.

XIII. THE GRAY AND THE TV
Despite the miniaturization of electronics, televisions are still wide, heavy and clunky furniture. The main problem has been to build a flat kinescope, and this has not been solved with the cathode ray tubes commonly used. For several years it was thought to build a kinescope with thousands of plasma lights, but the problem is that an image was achieved without shades or degrees of brightness: the gray corresponded to a half-off light ... and that could not be. One way out of this difficulty is for the light bulbs to turn on intermittently, so that the brightness is proportional to the time spent on, as demonstrated in research by the Hitachi company of Japan and the University of Illinois.