Practice Practice Problems (6) - Propagation of Light and Geometric Optics

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9 questions

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6 sample questions

Question 1.
Define Fermat’s Principle.
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Think about the fastest route!
Question 2.
What does Snell’s Law describe?
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It relates the angles to the refractive indices!
3Question 3.
What principle does Snell's Law derive from?
- Wave Theory
- Fermat's Principle
- Newtons' Law
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Think about the fastest path light takes.
4Question 4.
At Brewster's angle, the reflected light is completely polarized. True or False?
- True
- False
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Recall the properties of light reflection!
Question 5.
A light beam travels from air (n=1) into water (n=1.33). Calculate the angle of refraction if the angle of incidence is 30 degrees.
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Check your sin values carefully!
Question 6.
Given a concave mirror with a radius of curvature R = 40 cm, find its focal length.
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Use the formula f = R/2 for mirrors!

5 more questions in this section. Enroll free to practise them all.