There are many famous stories about technological innovation, such as:
1. In 1801, Humphry Davy, a British chemist, electrified a platinum wire and made it glow. From then on, the whole world was looking forward to electric lights. 's early arrival. However, this expectation was not achieved until 1878. In 1874, two Canadian electrical technicians applied for an electric light patent. They filled the glass bubble with helium and used an electrified carbon rod to emit light. But they did not have the financial resources to develop the invention.
2. In 1875, Edison tried to improve the filament with various materials to extend the service life of the light bulb. In 1879, he replaced the carbon rod with carbon filament, and the service life of the light bulb reached 13 hours. This made electric light popular.