CK-12 Physical Science Concepts - For Middle School

5.16. Thermal Radiation http://www.ck12.org

FIGURE 5.34

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Watch the video “Thermal Radiation” at the following URL. Then answer the questions below.

http://teachertube.com/viewVideo.php?video_id=186388&title=Thermal_radiation

1. What does a night vision camera detect?


2. The kind of light an object gives off depends on its __.


3. Thermal radiation occurs when an object gives off __ light.


4. Explain why some objects appear brighter than others when viewed through a night vision camera.


5. In the video, the scientist places her hands inside a black plastic trash bag. You can’t see her hands with your
   eyes but you can see them with a night vision camera. Explain why.

Review

1. What is thermal radiation?


2. If you sit close to a campfire, the fire warms you. Describe how thermal energy is transferred from the fire to
   you.