Exam-style question
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A beam of light travels from water (refractive index 1.33) into air (refractive index 1.00). Calculate the angle of refraction if the angle of incidence is 30 degrees.
Model answer
What a good answer should say
- The angle of refraction is 22.0 degrees.
Explanation
Why this works
This question assesses the application of Snell's law to find the angle of refraction when light passes from one medium to another. It requires substitution and calculation based on the given indices.
Common mistake
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