A Phenomenon Whereby an Intensely Lit Black Object Appears to Be

question 13

Multiple Choice

A phenomenon whereby an intensely lit black object appears to be gray or white in a homogeneously dark space is known as ______.

• A)lightness constancy
• B)the Gelb effect
• C)the Ponzo illusion
• D)phenomenological lightness

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Definitions:

Dilation

The process of expanding or widening an opening or structure in the body, often referring to blood vessels, the pupil of the eye, or the cervix during childbirth.

Collapse

The sudden failure or loss of strength leading to a fall or the falling in of something, such as a structure.

Orthopnea

Difficulty in breathing that is relieved by sitting or standing in an upright position, commonly associated with heart and lung diseases.

Orth/o

A prefix meaning straight, correct, or right, used in medical and technical terms.