Practice Fermat’s Principle Of Stationary Time (1) - Propagation of Light and Geometric Optics

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9 questions

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6 sample questions

Question 1.
What does Fermat's Principle state?
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Think about paths and time.
Question 2.
What is the angle of incidence?
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Normal is the imaginary line perpendicular to the surface.
3Question 3.
What does Fermat's Principle state?
- Light travels the fastest path
- Light travels the shortest distance
- Light travels the path of least time
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Think about how light behaves in different situations.
4Question 4.
True or False: The angle of reflection is always equal to the angle of incidence.
- True
- False
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Visualize a mirror.
Question 5.
Suppose light travels from air (n=1.0) into glass (n=1.5) at an angle of incidence of 30 degrees. Calculate the angle of refraction.
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Find sin(30) and use it in the equation.
Question 6.
If a mirage is observed on a hot road, describe how Fermat’s Principle defines the light's path to create this illusion.
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Focus on the refractive index variations caused by temperature gradients.

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