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3 cards from this section. Quick, good the night before a test.
What is refraction?
Think about how light behaves when it enters water.
What does Snell's Law describe?
Recall the equation with refractive indices.
What is the phenomenon of light bending when it passes from one medium to another called?
It's the term we discussed at the start.
True or False: The refractive index is always greater than 1.
Consider what happens when light enters a vacuum.
A beam of light enters a diamond (n=2.42) from air (n=1) at an angle of 40 degrees. What will be the angle of refraction in the diamond?
Remember to rearrange the formula to find sin(θ).
Explain how the principles of refraction are applied in a camera lens to focus light. Include relevant formulas.
Think about how the focal length changes with different lens shapes.
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