The history of light Lumisa 26/07/2018 Energy 0 Nowadays we are so accustomed to using electricity for everything in our daily life, that we do not consider how essential this phenomenon is and how it changed the course of the history of humanity. Normally when we think of electricity we quickly associate it with light, ignoring that all the appliances, objects and appliances that we use every day work thanks to electricity. Even if we stop to think, we all know that it represents a potential danger because if we "put our fingers in the socket" we can electrocute even to death. Normally we do not think about it, that we enjoy a very efficient electricity with a highly effective security system. And what is electricity exactly? In order to explain the history of electricity we must first understand what it is. It is a set of phenomena that are produced by the movement and interaction between the positive and negative electric charges of the physical bodies. That is, the flow of charged particles called electrons through a conductive medium. In particular, it is an energetic form that we can only appreciate because of the effects it produces. It exists everywhere, our body, in the objects that we touch and that surround us. It is a secondary energy source The primary energies are those obtained directly from nature, such as oil, natural gas, coal, solar energy, hydro, wind, etc. In contrast, secondary energies are the result of the use of primary energies and transformation, to be able to consume and use them, such as oil, coal, gas oil and derivatives, and also electricity. History of electricity The first observation of which we have evidence dates from the year 660 a.C., by the Greek philosopher Thales de Mileto. One day, he observed that by rubbing a rod of amber with wool or skin, small charges were obtained, which attracted small objects, this is called triboelectric effect, and rubbing a long time could cause the appearance of a spark. Later the ancient Greeks observed that the pieces of the magnetite stones attracted each other, just as they were attracted by iron objects. That's where the magnets and magnetism come from. In later centuries not much attention was paid to the phenomenon. Some observations were made, but it was not until William Gilbert entered the scene, under the orders of Queen Elisabeth I, that he observed and studied the magnets used as compasses for navigation. Thanks to this fact, he coined as "electric force", to the attraction produced by glass or amber, on other objects. Benjamin Franklin was a great politician, scientist and inventor. He is considered one of the founding fathers of the United States. In 1752, he carried out one of the most relevant experiments for the development of modern science, the kite experiment. To carry it out, he tied a kite with a metal frame to a silk thread that had a key on its end, also made of metal. He waited until there was a lightning storm to blow up the kite. Franklin validated his main hypothesis, noting that the key was charged with electricity, which meant that the clouds were electrically charged and that the lightning bolts were electric shocks. Therefore, Benjamin Franklin became a pioneer with his simple discovery that was a precursor to further research and important discoveries. Several scientists interested in this topic studied more about electricity and began to understand how it worked. In 1879 Thomas Edison invented the first electric bulb and since then, our world has been illuminated. Later, Nikola Tesla, discovered the alternating current, which provided the bulbs more durability.