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PSYC 450 Quiz 1 questions and answers complete solution rated A+ correct 2024/2025
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PSYC 450 Quiz 1 questions and answers complete solution rated A+ correct 2024/2025
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PSYC 450 Quiz 1What range of wavelengths can we see as light? CH2
Goes from about 370 nm to 730 nm. Perceive differences in wavelength as differences in color.
What factors can cause the optic array to vary over time? CH2
The optic array is basically just what you can see. It varies over space and time. As you move around,
your eyes are responding to different light conditions and how different objects are moving in the scene.
Also depends on the angle that you are looking at something. Ex: woman sitting down and looking at
lamp and able across the room vs. woman standing up and looking at the same things. Varies depending
on spatial arrangement of objects, and their shape, texture, and color.
Define field of view. How does the field of view of humans differ from that of animals with eyes on the
sides of their head? CH2
Field of view is the portion of the surrounding space you are located in that you can see with your eyes.
Animals with eyes on the sides of their head are able to see more of their surrounding areas. They can
see directly behind themselves, but also aren't able to see in front of them as well as humans.
How does the iris control the amount of light entering the eye? CH2
The iris contracts and relaxes the pupil in response to the intensity of the light coming into the eye. The
iris contracts in response to intense light, reducing the amount of light that enters the eye. The iris
relaxes in dim light, allowing for more light to enter the eye.
What is accommodation? How does the lens accommodate (change) in order to focus on objects at
different distances from the eye? CH2
Accommodation is when the lens changes shape so that the eye is able to focus on different objects.
Fill in the names of the retinal layers next to their contents. CH2
Inner nuclear layer- Bipolar cells, horizontal cells, and amacrine cells
Ganglion cell layer- Synapses among RGC's, amacrine cells, and bipolar cells
Outer synaptic layer- Synapses among photoreceptors, horizontal cells, and bipolar cells
Rods and cones-
What is the operating range of the eye? How is photo pigment regeneration involved in the process of
dark adaptation, by which the visual system changes its operating range to adjust to changes in overall
illumination? CH2
The operating range of the eye changes according to the current conditions. During dark adaptation, the
retina "gets used" to the dark and the change in the operating range.
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