How your black and white TV works...?

There is a cathode ray tube inside your TV. The cathode is negatively charged plate that is heated in order to provide enough energy to allow it to emit electrons. These electrons are accelerated towards positively charge plate called the anode. The electrons leaves anode and start out in random directions until they pass between anode and cathode. The electric force between anode and cathode is what produces the beam. The beams hits inside of your TV screen, which called Phosphor. A phosphor is a type of chemical that glows when hit by an electron. As the electron collide with screen the phosphor light up.