Nipkow disk

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/nipkow-disk

1. What is the inventor?
2. What is the year patented?
3. What is the Nipkow disk and why was it important for early TVs?
4. How does the spinning disk turn a picture into a signal that can be sent to a TV screen?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the inventor?Paul Gottlieb Nipkow
2. What is the year patented?1884
3. What is the Nipkow disk and why was it important for early TVs?The Nipkow disk is a flat, spinning disk with holes arranged in a spiral. It was the first device that could scan a picture line by line, letting early TVs capture and send moving images.
4. How does the spinning disk turn a picture into a signal that can be sent to a TV screen?Light from the scene goes through the holes as the disk spins, hitting a photoelectric cell. The changing light makes an electrical signal that can be sent to the receiver.

Nipkow disk: A mechanical scanning device featuring a rotating disk with a spiral arrangement of perforations, crucial for early television.
Mechanical Television: An early television system that utilized physical, rotating components to capture and display images, contrasting with later electronic systems.
Image Scanning: The process of systematically analyzing an image by dividing it into a series of lines or points to capture its visual information.
Photoelectric Cell: A device that converts light energy into electrical energy, used in conjunction with the Nipkow disk to generate video signals.