How Does a TV Work?

How Does a TV Work?

How Does a TV Work?
Reading Level

	edHelper's suggested reading level:	grades 5 to 8
	Flesch-Kincaid grade level:	5.73

Vocabulary

	challenging words:		recorder, transmit, recording, resent, scanner, receiver, satellite, broadcast, electromagnetic, replay, circuit, towers, strengthen, select, record, works
	content words:		When TV, Cable TV

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How Does a TV Work?
By Cindy Grigg

¹     Caption: Behind-the-scenes of the ESPN show SportsCenter. Notice the three TV cameras that are recording the show.

²     Did you ever wonder how TV works? How does your favorite TV show get to your TV set? Your favorite TV show begins in a studio. TV cameras record the sound and pictures. TV cameras change the sound and light into electromagnetic waves. Let's call them EM waves. This form of invisible energy makes a pattern that is like a code. When the code is "read," it is changed back into sound and pictures on your TV set.

³     EM waves recorded by the TV cameras are sent to the TV station's tower. This tower sends the signal to other towers called broadcasting towers. Because buildings and mountains can block electromagnetic waves, the signal gets picked up by different towers and resent. Sometimes the tower's signal is beamed up to a satellite. Satellites can strengthen the waves and send them to anywhere in the world. Many people have a satellite dish at their home. This dish receives TV signals from satellites.

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