10.3 - REFRACTION AND REFLECTION OF PLANE WAVES USING HUYGENS PRINCIPLE
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Practice Questions
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Define Huygens' principle in your own words.
💡 Hint: Think about how waves spread from a point.
What happens to the speed of light when it enters a denser medium?
💡 Hint: Consider how light behaves in water vs. air.
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Interactive Quizzes
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What is Huygens' principle?
💡 Hint: Think about how waves come from the source.
Snell's Law relates which two angles?
💡 Hint: Consider what angles are affected when light crosses a boundary.
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Challenge Problems
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A light beam enters a glass block (n = 1.5) from air (n = 1) at an angle of 45 degrees. Calculate the angle of refraction.
💡 Hint: Use inverse sine to find the angle.
If an incident beam creates a 30-degree angle with the normal in air and results in a reflected angle of 30 degrees but refracts at 20 degrees, calculate the refractive index of the second medium.
💡 Hint: Remember to manipulate the sine function properly.
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