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

question 82

Multiple Choice

The following items are positioned in sequence: A source of a beam of natural light of intensity $I _ { 0 }$ , three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer. The axis angle of polarizer $A$ is set at $0 ^ { \circ }$ (vertical) , and the axis angle of polarizer $C$ is set at $50 ^ { \circ }$ . Polarizer $B$ is set so that the beam intensity is zero at the observer. What are the two possible axis angle settings (less than $180 ^ { \circ }$ ) of polarizer B?

• A) \(90 ^ { \circ }\) and \(140 ^ { \circ }\)
• B) \(40 ^ { \circ }\) and \(130 ^ { \circ }\)
• C) \(40 ^ { \circ }\) and \(90 ^ { \circ }\)
• D) \(40 ^ { \circ }\) and \(140 ^ { \circ }\)
• E) \(90 ^ { \circ }\) and \(130 ^ { \circ }\)

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