what are the primary colours of light vs colour
light: red, green, blue
colour: red, yellow, blue
what do red and green light mix to give you
yellow
what do red and blue light mix to give you
magenta
what do green and blue light mix to give you
cyan
what do all colours of light mix to give you
white
white light is made up of…
all colour wavelengths
describe the behaviour of the primary light colour wavelengths so that we see a blue board
red: absorbed
green: absorbed
blue: reflected
for seeing colour:
we see the ____ wavelengths, the rest are ___.
reflected
absorbed
all light reflected =
white
no light reflected =
(all absorbed)
black
diffraction gratings split…
the white light, spreading out the other colour wavelengths
what do colour filters do
absorb some wavelengths and transmit the others (the one(s) you see)
reflection vs transmission vs absorption
light bounced off
light travels through
light stops, is absorbed
