8. Lighting the Way: A Project at The Smithsonian
   A Smithsonian project to gather historical materials pertaining to the history of electric lighting during the past 30 years.
   http: //americanhistory.si.edu/csr/lightproject/
   
   
9. Northern Lights Introduction
   Introducing the Aurora,Earth's Great Light Show
   http: //athena.ivv.nasa.gov/curric/space/aurora...
   
   
10. Rainbow Facts
    Questions about Rainbows.
    http: //deltatech.com/rv/rainbows.html
    
    
11. The Speed of Light
    Describes how the speed of light was measured. Curriculum-based science quizzes about light for K-12 (Grade 4 to Grade 7) students.
    http: //what-is-the-speed-of-light.com
    
    

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