What is an afterimage? How is it formed?
What will be an ideal response?
An afterimage is a negative image formed after looking steadily at an object for a time. The bright portions of the image cause light adaptation of the retina while the dark portions cause dark adaptation. In other words, areas of the retina that are stimulated by light become less sensitive while areas that are exposed only to darkness gain in sensitivity. If you then move your eyes away from the scene and look at a bright white surface, you see exactly the same scene that you had been viewing, but the light areas now appear dark and vice versa.
You might also like to view...
In an ECG pattern, the P wave is caused by
A) depolarization of ventricular muscle fibers. B) repolarization of ventricular muscle fibers. C) depolarization of atrial muscle fibers. D) repolarization of atrial muscle fibers.
Cleaning of contaminated waste from the environment is important when treating an animal with a. antinematodals
b. anticestodals. c. antitrematodals. d. coccidiostats.
Each cone contains three different photopigments for selectively responding to red, blue, or green wavelengths of light
Indicate whether the statement is true or false
Which of the following functions would most likely be controlled by the representational hemisphere of the cerebrum?
A. Diagnosing a patient's disease B. Giving a speech C. Painting a picture D. Balancing your checkbook E. Answering this question