An Optical Fiber Made of Glass with an Index of Refraction

question 18

Multiple Choice

An optical fiber made of glass with an index of refraction 1.50 is coated with a plastic with index of refraction 1.30.What is the critical angle of this fiber at the glass-plastic interface?

• A) 90.0°
• B) 41.8°
• C) 60.1°
• D) 50.2°
• E) 61.1°

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Definitions:

Lie Detector

A device or procedure that attempts to determine whether a person is telling the truth by measuring physiological responses.

Law Enforcement

Agencies and officials tasked with maintaining public order, enforcing laws, and preventing, detecting, and investigating criminal activities.

Inductive Approach

A method of reasoning that creates general principles from specific observations, often used in scientific and empirical research.

Polygraphs

Devices used in an attempt to detect lies, measuring physiological responses believed to be indicators of truthfulness or deception.