Examlex
In our solar system,which planet is a member of the terrestrial group?
Retina
The retina is the light-sensitive layer of tissue at the back of the eye, which detects light and converts it into neural signals for processing by the brain.
Absolute Threshold
The minimum level of stimulus intensity needed for a person to detect its presence at least half the time.
Color Vision
The ability of the eye and brain to perceive differences in wavelengths of light as differing colors.
Light Intensity
The amount of light that hits a surface per unit area, often measured in lumens per square meter, and affecting how bright or dim an environment appears.
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