Optics Section:

 

1.  Draw a sketch or diagram of a periscope that uses triangular prisms and show the path of the light ray.  What is the total internal reflection?  How does it work?   

2.  Explain how and why stars twinkle or why a mirage appears in the desert.  

3. A convex lens has a focus length of 6 cm, and there is an object that is 12 cm from the lens.  The object has a height of 4 cm.  Use the lens and magnification equations to determine the location and size of the image.  

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