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3 cards from this section. Quick, good the night before a test.
Define Fermat’s Principle in your own words.
Think about the quickest route you would take.
What does the law of reflection say?
Remember the formula `i = r`.
What does Fermat's Principle state about light?
Think of the quickest way light can travel.
True or False: The angle of incidence is always equal to the angle of reflection.
Remember the relationship between these angles.
A light ray strikes a mirror at an angle of 45 degrees. What is the angle of reflection? Explain your reasoning.
Remember `i = r`.
Design a reflective surface that can enhance visibility in a dark room. Explain how the angles play a role in this design.
Think about where light comes from and where it needs to go.
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