PSY450: EXAM2 (Sensation and
Perception, Vision Hearing, Touch,
Smell) 2025 Expert Verified | Ace the Test
Sensation VS perception: - 🧠ANSWER ✔✔-sensation=stimuli or energy
gets detected by nerves
-perception=the stimuli gets interrupted by brain
*world>energy>sensation>perception
Light energy: - 🧠ANSWER ✔✔-light stimulus for vision
-electromagnetic radiation structured in waves over space
-photons wavelength=color
,-amplitude=intensity, brightness
-high(blue) to low(red) frequency
-long nm (low freq, red) to short nm (high freq,blue)
-can travel in pure nm or multi (DON'T mix but brain will morph it!)
Light structure: - 🧠ANSWER ✔✔-light travels far, straight, fast
-light can be absorbed, reflected, scattered(refracted)
-color dependent on 3 factors:
1. amount absorbed=brightness/contrast
2. wavelength absorbed=hue/color type
3. amount scatter=properties/texture
*no white wavelength
3 Light problem and how it got resolved: - 🧠ANSWER ✔✔PROBLEM=
, -photons hit object and scatters linearly all over the place (only specific
angled rays can deflect into tiny pupil), makes poor clarity, relys on
distance
SOLUTION=
1.) each rays projects upsidedown forming spatial ordered image in retina
(camera obscura by Alhazen) BUT little light will give blurry image
2.) add converge lens can collect more light giving sharper image BUT
clarity depends on power of lens, angle divergence (changable by adjusted
distance)
3.) adding a variable-power lens that can change shape (accomodate
scatter, clarity, distance problem)
*thus the design of the eye is how it is today...cornea, iris, lens
Eye structure VS properties: - 🧠ANSWER ✔✔GATHER
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Perception, Vision Hearing, Touch,
Smell) 2025 Expert Verified | Ace the Test
Sensation VS perception: - 🧠ANSWER ✔✔-sensation=stimuli or energy
gets detected by nerves
-perception=the stimuli gets interrupted by brain
*world>energy>sensation>perception
Light energy: - 🧠ANSWER ✔✔-light stimulus for vision
-electromagnetic radiation structured in waves over space
-photons wavelength=color
,-amplitude=intensity, brightness
-high(blue) to low(red) frequency
-long nm (low freq, red) to short nm (high freq,blue)
-can travel in pure nm or multi (DON'T mix but brain will morph it!)
Light structure: - 🧠ANSWER ✔✔-light travels far, straight, fast
-light can be absorbed, reflected, scattered(refracted)
-color dependent on 3 factors:
1. amount absorbed=brightness/contrast
2. wavelength absorbed=hue/color type
3. amount scatter=properties/texture
*no white wavelength
3 Light problem and how it got resolved: - 🧠ANSWER ✔✔PROBLEM=
, -photons hit object and scatters linearly all over the place (only specific
angled rays can deflect into tiny pupil), makes poor clarity, relys on
distance
SOLUTION=
1.) each rays projects upsidedown forming spatial ordered image in retina
(camera obscura by Alhazen) BUT little light will give blurry image
2.) add converge lens can collect more light giving sharper image BUT
clarity depends on power of lens, angle divergence (changable by adjusted
distance)
3.) adding a variable-power lens that can change shape (accomodate
scatter, clarity, distance problem)
*thus the design of the eye is how it is today...cornea, iris, lens
Eye structure VS properties: - 🧠ANSWER ✔✔GATHER
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
