How does light energy travel?
In waves
What are wave lengths?
The distance from the peak of 1 light/sound to the next.
What is hue and what determines it?
The dimension of color we experience that’s determined by the wave length.
What is intensity and what determines it?
The amount of energy in a light wave or sound wave, that’s determined by height/amplitude.
What is the cornea?
The eyes clear, protective outer layer that covers the pupil and iris. This is where light first enters
What is the pupil?
The adjustable opening in the center of the eye. After the cornea light goes here.
What is the iris?
A ring of muscle tissue that forms the colored portion around the pupil. It controls the size of the pupils opening. Ex) If it’s sunny our iris constricts making our pupil smaller.
What is the lens?
Transparent stricture behind the pupil that changes shape to help focus images on the retina. Light hits here after the pupil
What is the retina?
The light sensitive inner surface of the eye. Contains the photoreceptors, rods and cones.
What is accommodation?
The process by which the eye lens changes shape to focus near or far objects on the retina.
What are rods?
Retinal receptors that detect black white and gray, and are sensitive to movements.
The are necessary for peripheral and twighlight visions when cones don’t respond.
What are cones?
Retinal receptors that are at the center of the retina and function welll in daylight. They detect fine detail and give rise to color sensations.
What happens in between rods/cones to bipolar cells?
Neural signals are sparked by the retinal receptors in nearby bipolar cells. (Then to ganglion sells)
what is the optic nerve?
The nerve that carries neural impulses from eye to brain.
After the optic nerve Neural impulses goes to what?
The thalamus, then occipital lobe
What is a blind spot?
The point at which the optic nerve leaves the eye, so no receptor cells are located there.
What is the fovea?
The central focal point in the retina that’s surrounded by a cluster of cones.
What is the three color theory(Young-Helmholtz trichromatic)?
The retina contains 3 different types of color receptors, red green and blue. Creates any perception of color when stimulated together.
`What is the opponent process theory?
Theory that opposing retinal process (red-green, blue-yellow, white-black) enable color vision.
What are feature detectors?
nerve cells in the brains visual cortex tat respond to specific features of the simulus
What is parallel processing?
Processing many aspects of a problem all together.
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