The Speed of Light in a Certain Material Is Measured

question 111

Multiple Choice

The speed of light in a certain material is measured to be 2.2 × 10⁸ m/s.What is the index of refraction of this material? (c = 3.0 × 10⁸ m/s)

• A)1.1
• B)1.2
• C)1.4
• D)1.6
• E)1.8

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Definitions:

Worker Fatigue

Physical or mental exhaustion experienced by workers, which can reduce efficiency, productivity, and safety in the workplace.

Allowance Factor

A factor applied in planning and design processes to account for potential deviations from standard or expected conditions, ensuring extra capacity or tolerance.

Time Study

A systematic observation and recording of times it takes to perform a specific task, used for setting standards and improving efficiency.

Sample Size

The number of observations or data points selected from a larger population for the purpose of statistical analysis.