Okay kiddo, today we're going to learn about Ernst Alexanderson. He was a very smart man who worked on making things that could help people communicate over long distances.
One of the things that Mr. Alexanderson worked on was called the Alexanderson alternator. This was a machine that could make a lot of high-frequency electricity. People could then use this electricity to send messages over long distances using radio waves. Imagine being able to send a message to someone who is very far away, like across the ocean, just by using radio waves!
Mr. Alexanderson also helped create another invention called the television. This is a machine that lets people watch moving pictures and hear sounds from far away. It's like looking through a window into another place! Mr. Alexanderson made improvements to this invention so that the pictures and sounds would be clearer and easier to see and hear.
So, thanks to Mr. Ernst Alexanderson, people can communicate more easily and watch shows from far away on their televisions!