In What Fundamental Way Do Humans (And Many Other Animals)

question 53

Multiple Choice

In what fundamental way do humans (and many other animals) utilize parallax for the measurement of distance?

• A) The eyes focus back and forth continuously, and the brain interprets the focusing in terms of distance to the object viewed.
• B) The eye can measure the time taken for light to travel from an object, and the brain interprets this information in terms of distance to the object viewed.
• C) Humans are always moving their heads slightly from side to side, and the brain compares the angles from each of these positions to obtain the distance to the object viewed.
• D) Human eyes are mounted horizontally about 10 cm apart, and the brain interprets the relative look angles of their eyes in terms of distance to the object viewed.