Question 1

Which property of a light wave determines the hue (color) that we perceive?

Accepted Answer

Wavelength

Question 2

The visible light spectrum ranges from approximately $$380\ \mathrm{nm} to$$ $$700\ \mathrm{nm}. $$Which color is associated with the shortest wavelength in this range?

Accepted Answer

Blue

Question 3

Which of the following pairs correctly matches the wave property with the perceived property?

Accepted Answer

Amplitude: brightness

Question 4

A person is having difficulty focusing on objects at different distances as they age. Which structure in the eye is most likely responsible for this change?

Accepted Answer

Lens

Question 5

What is the correct order in which light passes through the structures of the eye before being converted to a neural signal?

Accepted Answer

Cornea → Lens → Retina

Question 6

Which type of photosensitive cell is primarily responsible for color vision and is concentrated in the fovea?

Accepted Answer

Cones

Question 7

Why do humans have a blind spot in their visual field?

Accepted Answer

It is where the optic nerve leaves the eye to go to the brain.

Question 8

Which of the following best describes the function of rods in the retina?

Accepted Answer

Detecting movement and vision in low light

Question 9

According to the trichromatic theory of color vision, how many types of cones are there and what are they sensitive to?

Accepted Answer

Three types; each sensitive to a different range of wavelengths

Question 10

A person with deuteranopia is unable to distinguish between certain colors. Which type of cone is non-functional in this condition?

Accepted Answer

Green

Question 11

Which theory of color vision explains the phenomenon of afterimages, where staring at a color for a long time results in seeing its opposite?

Accepted Answer

Opponent process theory

Question 12

If a person is able to see well in dim light but has difficulty distinguishing colors, which type of photoreceptor is likely functioning properly?

Accepted Answer

Rods

Question 13

Which of the following is NOT a pair of opponent colors according to the opponent process theory?

Accepted Answer

Green/Yellow

Question 14

A patient reports that they can see objects in their peripheral vision but struggle to see fine details or colors. Which part of the retina is most likely being used?

Accepted Answer

Peripheral retina (rich in rods)

Question 15

Which property of a light wave is most closely associated with the perceived property of saturation?

Accepted Answer

Complexity (number of wavelengths)

Question 16

A person is looking at a painting in a brightly lit gallery and can distinguish subtle differences in color. Which type of photoreceptor is primarily responsible for this ability?

Accepted Answer

Cones

Question 17

Which of the following best describes the process of accommodation in the eye?

Accepted Answer

The lens changes shape to focus on objects at different distances

Question 18

If a person stares at a green image for a long time and then looks at a white surface, they see a red afterimage. Which theory explains this phenomenon?

Accepted Answer

Opponent process theory

Question 19

Which of the following statements about cones is TRUE?

Accepted Answer

Cones are concentrated in the fovea and are responsible for high visual acuity.

Question 20

A person with normal vision is able to distinguish between red, green, and blue light. According to the trichromatic theory, which of the following best explains this ability?

Accepted Answer

They have three types of cones, each sensitive to a different range of wavelengths.

Sensation and Perception: Visual Stimuli and Color Vision

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