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Who invented the electric light bulb?
A. Nikola Tesla
B. Thomas Edison
C. Michael Faraday
D. Benjamin Franklin
Correct Answer Is Option = Thomas Edison
Notes / Explanation
The invention of the practical electric light bulb is most commonly credited to Thomas Edison, one of the most famous and productive inventors in history. Before the development of the electric light, people relied on the light of flames from candles, oil lamps and gas lamps to see in the dark, and these sources of light were often dim, smoky, dangerous and inconvenient. The dream of producing a clean, safe and steady light using electricity occupied the attention of a number of inventors, but it was Edison who succeeded in creating a light bulb that was practical, reliable and suitable for everyday use, and who also developed the wider system needed to make electric lighting available to ordinary people. The basic idea behind the electric light bulb is that when electricity is passed through a thin thread of suitable material inside a glass bulb, the thread becomes so hot that it glows and gives off light. The great difficulty was to find a material for this thread that would glow brightly without quickly burning out, and to keep the air out of the bulb so that the thread would last. Edison and his team carried out a vast number of experiments, testing many different materials before finding ones that worked well, and through this patient and determined effort they produced a bulb that could burn for a long time. Edison is famous for his remark that genius is mostly the result of hard work rather than sudden inspiration, and the development of the light bulb is a perfect example of this principle, since it depended on countless trials and great persistence. Beyond the bulb itself, Edison understood that for electric lighting to be useful, there had to be a way of generating and distributing electricity to homes and businesses, and he worked to develop the power stations and networks needed to supply electricity, helping to bring electric light into widespread use. The invention transformed daily life, allowing people to light their homes, streets and workplaces safely and conveniently, extending the hours of work and leisure and changing society in countless ways. For PPSC and other competitive examinations, the key points to remember are that the practical electric light bulb is credited to Thomas Edison, that it works by heating a thin thread until it glows, that its development required many experiments and great persistence, and that Edison also helped to create the systems for generating and distributing electricity.
