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Geometric Optics Reflection and Refraction

Learn about reflection and refraction in geometric optics when transitioning from air to water or water to air, the index of refraction, speed changes, and angle bends. Understand how the direction of light changes based on the refractive indices of the mediums involved.

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Geometric Optics Reflection and Refraction

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  1. Geometric Optics Reflection and Refraction Physics

  2. Refraction – Going from Air to Water The index of refraction, n, for air (vacuum) is equal to 1. The index of refraction for water is 1.33. If you are going from a LOW “n” to a HIGH “n”, your speed DECREASES and the angle BENDS TOWARDS the normal

  3. Going from Water into Air The index of refraction, n, for air (vacuum) is equal to 1. The index of refraction for water is 1.33. If you are going from a HIGH “n” to a LOW “n”, your speed INCREASES and the angle BENDS AWAY the normal Note: If the angles are EQUAL, then the “n” must be equal for each. The ray will pass straight through.

  4. Answer: Bend towards Because n1<n2 so possibly A or B Answer: Bend away Because n2<n1 so possibly A

  5. Practice Answer: Answer: Formula:

  6. Practice Answer:

  7. Practice

  8. Practice Answer:

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