The innermost layer of the eyeball. Light is imaged onto the retina by the lens. The retina contains three layers of neurons, including the photoreceptor neurons. The other neurons in the retina are responsible for sending impulse signals to the brain. A protein found in the membrane of rod cells that is responsible for the absorption of light, thus leading to our ability to see.
Rod cells are responsible for seeing at low light levels.
The light interacts with the molecule to excite either the molecule's motions or electrons. This interaction provides a signature response that can be measured with laboratory equipment. The signals provide information about the molecule's motion, or structure or electronic states. The process of changing from one form of energy to another form of energy. In this unit transduction refers to the transformation of light energy into chemical energy.