In a Stack of Three Polarizing Sheets the First and Third

question 55

Multiple Choice

In a stack of three polarizing sheets the first and third are crossed while the middle one has its axis at 45° to the axes of the other two.The fraction of the intensity of an incident unpolarized beam of light that is transmitted by the stack is:

• A)1/2
• B)1/3
• C)1/4
• D)1/8
• E)0

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Definitions:

Frequency Theory

A theory in auditory perception that suggests the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, enabling us to detect its pitch.

Afterimage

The lingering visual impression made by a stimulus that has been removed.

Scotoma

A spot in the visual field in which vision is absent or diminished, often due to damage in the visual pathway.

Illusion

A false perception or misinterpretation of a real sensory stimulus, often leading to an incorrect understanding of reality.