I was watching a program on TV awhile back about birds. At one point I noticed several of my cats sitting in front of the TV watching intently. Other than a rare quick glance at the cats, my dogs didn’t pay any attention to the program we were watching. Cats have a tendency to watch TV more than dogs, because it’s easier for them to view what’s on the screen.
We can thank a handful of inventors for coming up with the idea for television, but the person credited with sending the first successful transmission on September 7, 1927 goes to Philo Farnsworth. He was a 14 year old high school student when he began to dream about the concept of TV while living on a farm that had no electricity. Ironically, after his invention became commonplace, Farnsworth wouldn’t let his children watch TV because he believed the programming was too dumbed down.
Radio waves fly through the air at the speed of light as patterns of unseen electricity and magnetism. When you turn on your television, a series of tiny dots of light called pixels flash on the screen in a specific pattern according to the video signal received. The patterns are seen by our eyes and transmitted to the brain where the tiny dots are organized into an image we recognize. We see movement because the image on the TV screen is refreshed hundreds of times a second, giving the illusion of movement. We don’t notice it because it’s faster than our eyes can see.