The illustrations below demonstrate most electromagnetic waves that we know. Frequency of a wave is the number of vibrations in a given time (measured in Hertz). The higher the frequency the smaller the wavelength, the lower the frequency the larger the wavelength.

1. Which wave has the highest frequency? 
     

2. Which wave has the lowest frequency?
     

3. Which wave can we see? 
   Circle and label this light on the diagram.
     

4. Which wave can we hear? 
   Why isn't this wave on the chart?
     

5. Which wave can take a picture of your bones? 
     

6. What uses microwaves?
     

7. Where do television waves come from? 
     

8. Where do radio waves come from?