Practice Refraction (9.3) - RAY OPTICS AND OPTICAL INSTRUMENTS

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8 questions

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Exercise
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6 sample questions

Question 1.
What happens to light when it passes from air into water?
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Think about the change in medium.
Question 2.
State Snell's Law.
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It relates angles to a constant.
3Question 3.
What is refraction?
- Bending of light
- Reflection of light
- Absorption of light
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Think about what happens when light enters water.
4Question 4.
True or False: The critical angle is the angle of incidence for which light is completely refracted.
- True
- False
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Recall the definition of critical angle.
Question 5.
Calculate the refractive index of a material if the angles of incidence and refraction are 40° and 25°, respectively.
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Use a calculator to find the sine values.
Question 6.
An optical fiber has a core refractive index of 1.5 and casing of 1.45. Determine the critical angle for light passing from the core to the casing.
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Make sure to use the correct surface order.

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