关于发明物的短文!

问题描述:

关于发明物的短文!
要创造者,第几年创造的,有什么用途,是什么东西,要英语短文!

Thomas Edison's greatest challenge was the development of a practical incandescent,electric light.Contrary to popular belief,he didn't "invent" the lightbulb,but rather he improved upon a 50-year-old ...