This text is meant to accompany class discussions. It is not everything there is to know about energy. It is meant as a  prep for class. More detailed notes and examples are given in the class notes, presentations, and demonstrations linked below under unit resources.
Click here for questions that go along with this energy section.
1. Can you have light without magnetism? Why or why not?
2. What did you see when you did the "smart phone activity? If you have a high speed mode on your camera, did you notice anything different?
3. Phonetically write how to say "Huygens" name.
4. Draw an illustration that shows the wavelet Huygen's principle.
5. Draw picture that illustrates Newton's "corpuscular theory of light."
6. A person is standing on the shore of a lake whose water surface is undisturbed. 10 minutes after sunrise the person can clearly see the sun across the water and its image in the water. Draw a picture of this seen and the light rays. Label all light rays and angles. Identify where the image is located.
7. Find stars this nearly the same number of light years away as you are old.
8. Can you see your star from the northern hemisphere?
9. How would describe the amount of light waves that we see in the "visible light" region of the entire electromagnetic spectrum?
10. A 1200 kg car is traveling down the road at 70 mph, if this car's energy was used to create an electromagnetic wave, then what part of the electromagnatic spectrum would the wave fall in?
11. If your car has a key fob it, and it is North America, then it operates on a frequency of 315 MHz. How long is this wavelength? Where does if fall on the electromagnetic spectrum?
12. The speed of light in a vaccuum and air is 3 x 108 m/s. What is the slowest speed of light?



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by Tony Wayne ...(If you are a teacher, please feel free to use these resources in your teaching.)