Arc transmitter

An arc transmitter is a type of device that uses electricity to send messages wirelessly through the air. It works by creating a spark, or arc, between two metal objects called electrodes. When the electricity flows through the air between the electrodes, it causes a sound wave to be created. This sound wave can be picked up by a radio receiver located some distance away, which is able to translate the sound wave back into the original message.

Think of it like playing a game of telephone with your friends. When you whisper a message into your friend's ear, they pass it on to the next person and so on until the message gets to the end of the line. In the same way, an arc transmitter sends a message through the air to a receiver located far away. The sound wave that it creates is like the message being whispered from person to person.

However, arc transmitters are not often used nowadays because they are inefficient and can cause interference with other electronic devices. Instead, modern technology uses other methods like radio waves or fiber optics to transmit messages wirelessly.