The Speed of Light in a Material Is What

question 22

Multiple Choice

The speed of light in a material is What is the critical angle of a light ray at the interface between the material and a vacuum?

• A) 30°
• B) 21°
• C) 24°
• D) 27°

---

Definitions:

Learned Helplessness

A condition in which a person or animal learns to behave helplessly, failing to respond even though there are opportunities for them to help themselves by avoiding unpleasant situations or by gaining positive rewards.

Internal Locus

The belief that one's actions are primarily controlled by personal decisions and efforts rather than external factors.

Type A Personality

A temperament characterized by excessive ambition, aggression, competitiveness, drive, impatience, need for control, focus on quantity over quality and unrealistic sense of urgency.

Uncontrollable Aversive Events

Situations or events that are unpleasant or harmful and cannot be controlled or avoided by the individual, often leading to feelings of helplessness.