[单项选择]

2

As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colors seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties of surfaces that give rise to color do not seem to change greatly under a wide variety of illumi nation colors, usually (but not always) looking much the same in artificial light as in day light. Both of these effects seem to be due in iarge part to the mechanism of color adapta tion mentioned earlier.
When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not im mediately affect the color seen but usually does affect the next area to which the gaze is shifted. The l
A. a time lag in the focusing ability of the eye
B. some inability to see colors of the latter-named objects until loss of sensitivity has been regained
C. the immediate loss of the "afterimage" of the first object
D. the adaptation in the central area of the eye but little adaptation in the lateral areas to the new intensity level