Duncan is trying to find a constellation of dim stars in the night sky.You recommend that he not to look directly at the stars.By using this approach,the light will fall ________ and on the part of the retina that has a higher concentration of _______,which are better at detecting dim light.
A)directly on the fovea;rods
B)directly on the fovea;cones
C)away from the fovea;cones
D)away from the fovea;rods

Question

Quizplus · Accepted Answer

By looking away from the fovea (center of the retina where cones are concentrated for high acuity vision), Duncan can utilize his peripheral vision which has a higher concentration of rods that are better at detecting dim light. Looking directly at the stars may also cause the bright central light to saturate the cones, making it harder to see dimmer stars.

Duncan Is Trying to Find a Constellation of Dim Stars