Final answer:
Rods in the human eye will show strong activation when looking at a dim light, as they are highly sensitive to low levels of light and are essential for night vision.
Step-by-step explanation:
If you look at a dim light, the rods in the human eye will show strong activation. Rods are photoreceptors found within the retina that are highly sensitive to low levels of light and are essential for seeing in dimly lit environments. They detect only shades of grey and do not convey color information. This is in contrast to cones, which are responsible for color vision and function best under bright light conditions. The cornea is indeed a protective layer on the front of the eye, but it does not respond to light in terms of photoreception. The pupil is an opening through which light enters the eye, and its size is regulated by the iris to adjust the amount of light that enters, but it is not a light-sensitive structure itself.