Question

you have studied the story of thomas alva edison.write a note appreciating his efforts in inventing the bulb

Answer 1

Thomas Alva Edison was a famous scientist who invented the bulb. While Swan worked in England, Thomas Edison was busy in the United States. He experimented with thousands of different filaments. His goal was to find materials that would light well and last for a long time. He brought in various metals and supplies from all over the world. Then in October of 1879, Edison had a breakthrough. He carbonized a piece of sewing thread. Using this as a filament, he was able to produce a light bulb that burned for thirteen and a half hours. By bending the filament, he could make the lamp burn for over 100 hours. Eventually Edison invented a bulb that could glow for more than 1200 hours. He received a patent in 1880 for his light bulb. It had the same features of today's modern light bulbs: an incandescent filament in a glass bulb with a screw base. So this made him to invent bulb ;)