Author: Joseph Baxter. Linear, quadratic and exponential functions have different graphs, equations, and characteristics. In this tutorial, compare the shape of linear, quadratic, and exponential curves on a graph, and explore how to identify a function as linear, quadratic, or exponential by examining x- and y-coordinates. (more)
The tier of cells at the back of the retina contains the light receptors, the rods and cones. Rods, which are far more numerous than cones, are responsible for our vision in dim light and are out of commission in bright light.
Rods and cones of the human eye. You can see in the drawing on the left that the back of the eye is lined with a thin layer called the retina. This is where the photoreceptors are located. If you think of the eye as a camera, the retina would be the film.The retina also contains the nerves that tell the brain what the photoreceptors are seeing.. There are two types of photoreceptors involved in sight: rods and cones.Rods work at very low levels of light.ods and Cones. show/hide words to know. 1  Cornea: is the clear outer surface of the eye the covers the iris, pupil, and the outer chamber of the eye... 2  more. 3  Epithelium: the layer of cells found lining the surface of most surfaces of the body.