The Following Are Positioned in Sequence: a Source of a Beam

question 13

Multiple Choice

The following are positioned in sequence: A source of a beam of natural light of intensity I₀; three ideal polarizers A,B,and C; and an observer.Polarizer axis angles are measured clockwise from the vertical,from the perspective of the observer.The axis angle of polarizer A is set at 0° (vertical) ,and the axis angle of polarizer C is set at 50°.Polarizer B is set so that the beam intensity is zero at the observer.Which of the following pairs of angles are possible axis angle settings of polarizer B?

• A) 40° and 90°
• B) 40° and 130°
• C) 40° and 140°
• D) 90° and 130°
• E) 90° and 140°

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Definitions:

Depersonalization

A dissociative symptom in which one experiences a sense of unreality, detachment, or being an outside observer of one’s own thoughts, feelings, bodily sensations, or actions.

Derealization

A dissociative symptom in which one has a sense of unreality or detachment with respect to objects or other people in the environment, experiencing them as unreal, dreamlike, foggy, or distorted.

Dissociative Amnesia

A dissociative disorder characterized by sudden loss of memory for important autobiographical or personal information, which is not due to a neurological or other medical condition. Characterized by a sudden onset, typically in response to a traumatic event or extremely stressful experience, and by an equally sudden return of memory.