How do tvs work for kids

Televisions also produce sound through speakers. The images on a TV screen refresh fast enough to appear as smooth motion to the human eye. Early television was displayed in black and white. Similar to radio, television broadcasts are transmitted at specific frequencies. A TV can show pictures from many television networks. Computers and mobile devices also can be used for watching television programs. The television was invented in the s but the equipment was expensive and the pictures were poor.

By the s, these problems had been fixed and TVs became widespread. At first, all televisions used an antenna or aerial. This would pick up television programmes from broadcasting stations. A TV station could be many miles or kilometers away, and still be received. Cable TV and Satellite television can provide more programs at once than broadcast can. Video game consoles connect to most modern TVs.

Some computers can also use a TV as a computer monitor. All TVs have screens where the picture is viewed. Before the s these were usually " black and white ", which made everything look grey, but all modern TVs show colors.

Most 20th century screens also had rounded corners. That is because television screens were cathode ray tubes. Inevitably, the day arrives when they hit you with one that leaves you stumped. To make matters worse, it's a question you should be able to answer because it's about something you use every day of your life. Probably the best place to start is with the TV. When these pictures are shown in the order they were taken, they appear to be moving.

Showing your child a flip book is a perfect way of illustrating this. Each of those pictures is made up of tiny colored dots, called pixels. Up close, pixels look like a bunch of colored dots. But from a distance, the pixels are too small to see each one. So instead, we see groups of pixels as whole objects. To better explain this, show your child a picture in a newspaper using a magnifying glass.

When a TV show or movie is acted out, light reflects off the people and objects.