Electronics is one of the most important branches of science till date. With its advancement the world has completely changed into a different thing. It has given a complete make over to our life, from being a sluggish one to a rapid fast life. It has influenced our life in each and every way. From the time we wake up in the morning till the night when we go to bed. Electronics is touching our life in every aspect. We use them for all purpose, either as a necessity, or just for the entertainment purpose, for example television, i pods, etc.
If we go back into the history of electronics, then we will come to know that there were three major components in electronics. The first was Vacuum tubes, which was invented by Thomas Alva Edison in the year 1883. He made the invention when he discovered that through vacuum, electrons can flow from one metal conductor to another. Later this discovery was given the term of Edison effect. With the invention of vacuum tube it became possible to manipulate the electrical energy; hence they were used for transmitting and amplifying purposes. In those days, the vacuum tubes were used to be very big in size, which easily gets heated up. After the invention of vacuum tubes, in the year 1904, John Fleming invented a two element electron tube called Diode. It was based upon the Edison effect. Eventually, in the year 1906 Lee De Forest invented the three element tube, the Triode. It was in 1896 when the first application of the electron tubes was made. They were used in radio communications by Guglielmo Marconi. By 1906, he finally made an impact by creating long distance radio communication. It proved to be revolutionary step in the field of electronics.
Prior to World War II, the development in the field of communication technology took at a very fast pace. According to the needs, various specialized tubes were produced. It was the period when radio was thought to be the primary source of entertainment, and also a form of education. In the year 1920, Bell Laboratories made an impact in the field of electronics, when the invented the television. By the year 1927, television finally became widely available. During the course, Bell Laboratories introduced the cathode ray picture tube and color television.
After the World War II, the first computer was developed through the electron tubes. But because of their bulky size, they were of not use. As necessity is the mother of invention, hence it resulted in the invention of transistors. A group of scientist from Bell Laboratories made the invention of transistors during the year 1947, for which they also received a Noble Prize. The invention of transistors gave a boost to the development of the world. They were smaller, lighter, cheaper, and more efficient in comparison to the vacuum tubes. Soon the concept of integrated circuits was introduced in the year 1952 from the Royal Radar Establishment. Since then, electronics has completely changed our life.
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