Question

module 1.6b sensation: vision

1. wavelength determines __________ whereas amplitude determines __________
2. label and describe the diagram of the eye:
3. how does the lens of the eye use accommodation?
4. where is the fovea located and what type of photoreceptor cell is located there?

Explanation:

1. Wavelength is associated with the perception of color. Amplitude is related to the perception of brightness.
2. The main parts of the eye in the diagram include the cornea (front - clear part that bends light), iris (controls amount of light entering), pupil (hole in the iris), lens (changes shape to focus light), retina (contains photoreceptor cells), and optic nerve (transmits visual information to the brain).
3. The lens changes its shape. When focusing on nearby objects, it becomes more rounded; for distant objects, it flattens. This process is accommodation.
4. The fovea is located in the center of the retina. Cone photoreceptor cells are densely packed in the fovea, providing high - acuity color vision.

Answer:

1. Color; Brightness
2. Cornea: Bends light at the front. Iris: Controls light entry. Pupil: Hole for light passage. Lens: Focuses light. Retina: Holds photoreceptors. Optic nerve: Transmits visual info.
3. Changes shape; more rounded for near, flatter for far.
4. Center of the retina; Cone cells.