When a Beam of Light, Which Is Traveling in Glass

question 21

Multiple Choice

When a beam of light, which is traveling in glass, strikes an air boundary, there is

• A) a 90° phase change in the reflected beam.
• B) no phase change in the reflected beam.
• C) a 180° phase change in the reflected beam.
• D) a 60° phase change in the reflected beam.
• E) a 45° phase change in the reflected beam.

---

Definitions:

Sales Promotional Material

Marketing tools designed to enhance awareness and sales of a product, including flyers, samples, and online ads.

Free Service

A service provided without charge to the consumer, often used as a promotional tool or as part of a freemium business model.

Warranty Expired

The cessation of a guarantee provided by the maker of a product, indicating no further responsibility for defects or faults.

Negative Organizational News

pertains to unfavorable information or updates conveyed within or about an organization, which can impact employee morale or public perception.