The Critical Angle in Air for a Particular Type of Glass

question 1

Multiple Choice

The critical angle in air for a particular type of glass is 39.0°. What is the speed of light in this class glass? (c = 3.00 × 10⁸ m/s)

• A) 1.97 × 10⁸ m/s
• B) 1.94 × 10⁸ m/s
• C) 1.91 × 10⁸ m/s
• D) 1.89 × 10⁸ m/s
• E) 2.00 × 10⁸ m/s

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