Benjamin Franklin’s most important find was that all electrical capacities are not equivalent. Instead, they retain one of two opposite charges, which has become the basis for the "plus" and "minus" terminology that is still used today. An understanding of positive and the negative charges helped to identify atmospheric and frictional electricity.Know More
Franklin’s work became the basis for the "single fluid" theory. This theory states that when something is being charged, electricity flows from a positive body with an excess charge to a negative body with negative charge. He proved that electricity is "fluid," meaning it can pass from one body to another.
Franklin invented many of the electrical terms that are still used today. At the time, Franklin felt that there were insufficient words to describe his observations and discoveries. Therefore, he created a new nomenclature that included words like charge, condenser, conductor, battery, plus, minus, positive and negative.
During his experiments, Franklin built an electrical battery, roasted a duck on a spit powered by electricity, sent a current through water to ignite alcohol and ignited gunpowder. He also came up with the idea of using an iron rod to attract lightning bolts and protect buildings from lightning strikes. This invention is now called the lightning rod.Learn more about Inventions
Benjamin Franklin invented swim fins, bifocals, the lightning rod, the Franklin stove, the mechanized glass armonica and the "long arm" for reaching books. He created the first map of the Gulf Stream and improved the odometer and the catheter. He also posited the theory that lightning is electricity.Full Answer >
Benjamin Franklin invented bifocals in 1784. As announced in a letter to a friend, he called the new invention "double spectacles." The glasses allowed a person to see far or near, depending on what part of the lens they were looking through.Full Answer >
Benjamin Franklin changed the world by helping write the Declaration of Independence and U.S. Constitution, negotiating the end of the Revolutionary War with the Treaty of Paris and becoming the first ambassador of the United States to France. He also had notable achievements as a publisher, author, scientist and inventor.Full Answer >
Rosalind Franklin is best known for discovering the structure of DNA and pioneering the use of X-ray diffraction. Franklin, a chemist, was born in 1920 in England and was educated at Cambridge University.Full Answer >