Information storage is the process of digitization of information, information after digitization is composed of 0 and 1, semiconductor storage media you can think of him as a lot of diodes, the conductive characteristics of the diode is positive voltage conduction, negative voltage resistance is very large, conductive we recorded him as 1, the break is 0, he is not a molecular change, that is, not a chemical reaction, write is to put Abstract information digitization process, for example, an image, you can think of it as a myriad of light and dark dots,0 is dark,1 is light, then the graph is data according to a certain law, and then these 0 and 1 according to the law into the storage medium, this is the writing of numbers. Propagation is to convert information into electrical signals, electromagnetic waves and other signals, electrical signals are the level of potential to express the signal, electromagnetic waves seem to be wavelength and frequency to express. Magnetic storage media is the simplest magnetic tape, through the magnetic strength of the tape, the magnetic head in the sweep of the tape will have magnetic flux changes, will produce a different strength of the current, and then through the current to make sound, the principle of the image is the same, but the specific how to make I do not know.
2, engraved, recorded, saved information energy frequency can be vibration playback, playback is output acoustic.
And that's how our brains and computers actually store information. All the information that people see, hear and feel is vibrated to brain cell molecules in the form of energy frequency, brain cell molecules generate vibration, vibration records foreign signals, energy frequency is information storage, and brain cell molecules can play back this vibration frequency, that is, playback of the original sound, that is, storage of information output.