In an optical experiment, a beam of light travels from a source located at point E E to a target at point F F . The beam encounters a flat mirror at point O O . To ensure the beam follows the quickest route from E E to F F after reflecting off the mirror, what must be true about the angles formed with the normal at the reflection point?

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0. Functions(0)

Introduction to Functions
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Piecewise Functions
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Transformations
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Exponent Rules
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Exponential Functions
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Properties of Logarithms
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Exponential & Logarithmic Equations
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1. Limits and Continuity(0)

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Finding Limits Algebraically
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2. Intro to Derivatives(0)

Tangent Lines and Derivatives
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Derivatives as Functions
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Differentiability
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3. Techniques of Differentiation(0)

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Curve Sketching
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Finding Global Extrema
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Applied Optimization
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Introduction to Definite Integrals
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Average Value of a Function
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Substitution for Definite Integrals
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Applied Optimization

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Problem 9Multiple Choice

In an optical experiment, a beam of light travels from a source located at point $E$ to a target at point $F$ . The beam encounters a flat mirror at point $O$ . To ensure the beam follows the quickest route from $E$ to $F$ after reflecting off the mirror, what must be true about the angles formed with the normal at the reflection point?

The angle of reflection must be twice the angle of incidence.

The angle of incidence must equal the angle of reflection.

The angle of incidence must be half the angle of reflection.

The angle of reflection must be perpendicular to the angle of incidence.

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