An example of breaking traditional innovation

One day, the inventor Edison handed a light bulb to his assistant Aptom, a graduate of mathematics department of Princeton University. Edison asked him to calculate the volume of glass light bulb. Aptom pondered the light bulb for a long time, then measured it up and down for a while with a tape measure, drew many sketches on the paper, filled in various sizes and listed many formulas. There is no result yet. Edison saw him sweating profusely, so he said to him, "My God, you'd better use this method to calculate!" " "He filled the light bulb with water and handed it to appleton. He said, "Pour this water into the measuring cup and look at its volume, which is the volume of the light bulb." Hearing this, the assistant suddenly realized, so he worked it out quickly. Teenagers should combine book knowledge with practice when learning knowledge, so that they can learn vividly, remember and use it.