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.
Central and Peripheral Vision. The light-sensitive rods and cones form a tightly packed network.Each eye contains 100 million rods and 3 million cones but they are not distributed evenly. Rods are mainly located in the outer edges of the retina, and cones are clustered in the center.