What's in Your TV?
This picture shows the amazing light show called the northern lights. Do you have a plasma screen TV? If so, you have a mini version of the northern lights inside your TV!
The Back Story
- Plasma screen TVs have gas-like plasma sandwiched between two glass plates in the screen. Plasma generates ultraviolet light and creates the picture on the TV screen.
- The problem is that the human eye can’t detect ultraviolet light. We can see only light in the visible range of the electromagnetic spectrum.
- So how do we see the picture on a plasma screen TV? Watch the following video to find out:
Can You Apply It?
Learn more about plasma screen TVs at the link below. Then answer the questions that follow.
- What is plasma? How common is it?
- The plasma inside a plasma screen TV starts out as a mixture of gases. What gases are used?
- How are the gases changed to plasma? How does this work?
- Describe the cells inside a plasma TV screen. What coats the cells? Why are the cells coated?
- Each cell can produce red, green, and blue light. How are other colors of light produced? How many different colors of light can be produced in this way?