There are more rods than cones,but many rods may synapse with one ganglion cell while only one cone does.Therefore,when light intensity drops at nighttime,we can expect a lit city street scene to be
A)intense in color and very sharp.
B)more black and white,but very sharp.
C)intense in color,but grainy.
D)more black and white and grainy.
E)identical to the image formed of the street in daytime.

Question

Quizplus · Accepted Answer

The decreased light intensity at nighttime activates more rods than cones, resulting in a black and white image. Additionally, because many rods synapse with one ganglion cell, the image may appear grainy. Therefore, the best choice is D: more black and white and grainy.

There Are More Rods Than Cones,but Many Rods May Synapse