An Optic Fiber Is Made of Clear Plastic with Index

question 21

Multiple Choice

An optic fiber is made of clear plastic with index of refraction of 1.50,surrounded by air.For what angles of incidence θ will light remain within the plastic fiber?

• A) θ ≥ 21.1°
• B) θ < 38.3°
• C) θ > 38.3°
• D) θ < 41.8°
• E) θ > 41.8°

---

Definitions:

Variable Costing

A costing method that includes only variable production costs (direct labor, materials, and overhead) in product costs, excluding fixed costs.

Fixed Overhead

Denotes the regular, recurring costs associated with running a business that do not fluctuate with production volume, such as rent, salaries, and utilities.

Net Income

Net income is the total earnings of a company after all expenses and taxes have been deducted from total revenue, indicating the company's profit.

Inventory

Goods and materials that a business holds for the ultimate goal of resale or processing.