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

---

Definitions:

Profit

The difference between the amounts received from customers for goods or services provided and the amounts paid for the inputs used to provide the goods or services.

Contribution Margin Ratio

A measure that calculates the portion of sales revenue that exceeds variable costs, expressed as a percentage.

Sales Dollar

The total revenue generated from selling goods or services, measured in dollars.

Operating Income

Earnings before interest and taxes (EBIT), representing the income generated from normal business operations.