Chapter 26: Q11CQ (page 955)
What is color constancy, and what are its limitations?
Short Answer
We can’t see the true color of the object due to color constancy.
Chapter 26: Q11CQ (page 955)
What is color constancy, and what are its limitations?
We can’t see the true color of the object due to color constancy.
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Get started for freeThe contact lens prescription for a mildly farsighted person is 0.750 D, and the person has a near point of 29.0 cm. What is the power of the tear layer between the cornea and the lens if the correction is ideal, taking the tear layer into account?
(a) Where does an object need to be placed relative to a microscope for its 0.500 cmfocal length objective to produce a magnification of -400? (b) Where should the 5.00 cm focal length eyepiece be placed to produce a further fourfold ( 4.00 ) magnification?
Consider a telescope of the type used by Galileo, having a convex objective and a concave eyepiece as illustrated in Figure 26.23(a). Construct a problem in which you calculate the location and size of the image produced. Among the things to be considered are the focal lengths of the lenses and their relative placements as well as the size and location of the object. Verify that the angular magnification is greater than one. That is, the angle subtended at the eye by the image is greater than the angle subtended by the object.
: A mother sees that her child’s contact lens prescription is 0.750 D. What is the child’s near point?
The power of a physician’s eyes is 53.0 D while examining a patient. How far from her eyes is the feature being examined?
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