Studied by 182 people
This ones gonna be a lil technical
Why do some objects appear to have a different colour to others?
Some objects are better at reflecting specific wavelengths of light over others
What is the term given to the range of wavelengths at which an object can reflect light effectively?
Reflectivity Spectra
What colour do short wavelengths of light represent the best?
Blue
What colour do long wavelengths of light represent the best?
Red
What colour do medium wavelengths of light represent the best?
Green
What is the name of the photo-pigment found in photo-receptor cells?
Rhodopsin
What wavelength does rod pigment receive light best at?
500 nm
Name the three types of cones that aid colour vision?
S, M and L Cones
True or False: Each type of cone is more effective at receiving a different portion of the visible light spectrum
True
Why is it impossible for rod cells to aid in colour vision?
There is only one type of rod cell, nothing to compare against
Outline the principle of uni-variance
Increase in photons makes colour unperceptive to a single rod cell, regardless of wavelength
What is another term for the number of photons from a light source?
Light intensity
What is the name given to the theory that all 3 types of cone cells are required for colour colour signalling?
Tri-chomatic theory
What are the 4 primary colours?
red, green, blue, yellow
What is a limitation of the tri-chromatic theory?
It does not outline how these cones mix their wavelengths to signal the correct colour
Outline the opponent process theory?
Perception of colour is processed by two opponent neural channels of cones
Using opponent process theory, outline the two channels required to perceive Red-Green colours
L cone channel and M cone channel
How can tri-chromatic and opponent process theory be used together to understand colour perception?
Tri-chromatic: response of cones —> Opponent process: Response of neurons
Outline Saturation
intensity of the dominant wavelength of that colour, relative to the rest of the spectrum
What is Monochromatism?
No Functioning Cones
What colours can monochromats see?
Black, White and Grey
What is Protonopia?
No L cones
What colours can people with protonopia not see?
Red
What is Deuternopia?
No M cones
What colours can people with deuternopia not see?
Green
What is Tritonopia?
No S cones
What colours can people with Tritonopia not see?
Blue
What is the term given to people with colour deficiencies that leave them with only two functioning cones?
Dichromats
Note 
Flashcard (21)