Sensation/Perception 2 - Waves/Sight

Question 1

How do properties of waves relate to light?

Answer 1

• frequency determines colour of light
• amplitude determines brightness

Question 2

How do properties of waves relate to sound?

Answer 2

• frequency determines pitch
• frequency/amplitude determine volume (db)

Question 3

How do we measure properties of waves in respect to light and sound?

Answer 3

by measuring frequency in hertz

Question 4

What is the electromagnetic spectrum?

Answer 4

• spectrum of visible and non-visible light based off of wavelength and energy

Question 5

What are some components of the eye and their function?

Answer 5

pupil - opening in eye
iris - muscles that adjust size of pupil
lense - focuses light on the fovea

Question 6

What is the function and location of rods?

Answer 6

• allow sight in darkness
• located in the retina

Question 7

What is the function and location of cones?

Answer 7

• allow sight of different colours
• located in the fovea

Question 8

What is the blind spot? Why do we have it?

Answer 8

• blind spot is at the optic nerve
• no receptors (cones and rods) = no perception

Question 9

How do we decode where and what a visual stimulus is?

Answer 9

• occipital lobe receives info
• ventral stream takes info to temporal lobe (identifies)
• dorsal stream takes info to parietal lobe (locates)

Question 10

What is a binocular cue and its role in sight?

Answer 10

• seeing with both eyes
• allows the perception of depth

Question 11

What is a monocular cue and its role in sight?

Answer 11

• sight through one eye
• uses hints in surrounding to detect depth

Question 12

What are some examples of monocular cues?

Answer 12

linear perspective - when two parallel lines seem to converge (train tracks)
relative size - size of objects signalling their distance
interposition - info gained from observing positions of objects

Question 13

What is binocular disparity?

Answer 13

• the two eyes receiving different information due to being spaced apart
• slightly different view of the world

Question 14

What is the opponent-process theory?

Answer 14

• three opposing colour pairs
• one is stronger and is visible
• when eyes get tired of seeing one, they see the other

Question 15

What are the three colour pairs according to the opponent-process theory?

Answer 15

blue vs yellow
red vs green
black vs white

Question 16

What is the trichromatic theory?

Answer 16

• there are three primary colours (red, green, blue)
• 3 cones detect 3 wavelengths