3 Additive Colour Theory White light is composed of all the colours of lightWhite colour can be created by combining the three PRIMARY colours (red, green, and blue) of light in equal parts
4 SECONDARY Colours are created by combining only two of the three primary colours of light in equal partsRed light and blue light produces magentaRed light and green light produces yellowBlue light and green light produces cyan
5 The additive colour theory applies to SOURCES of light
6 Subtractive Colour Theory of Light When light hits an object some wavelengths of light are reflected and others are absorbed, or subtractedThe colour that you see when you look at an object is the colour of the light that object reflectsA pigment is a chemical that absorbs some colours of light and reflects other colours of light
30 Primary and Secondary ADDITIVE Colour Theory in a nutshell Primary and Secondary SUBTRACTIVE Colour Theory in a nutshell
31 Learning CheckpointUtilize pp. 386 to 388 to answer the following questions p. 388 # 1, 2, 3, 4, 5
32 Learning Checkpoint Answers The wavelength or frequency determines the colour.Red, orange, yellow, green, blue, and violet are six general categories of colour.The visible spectrum is the part of the electromagnetic spectrum that the human eye can see – it goes from red through violet.
33 Learning Checkpoint Answers Each of the visible colours of light can be approximated by an appropriate mixture of red, green, and blue light.Each of the visible colours of pigments can be approximated by an appropriate mixture of magenta, cyan, and yellow pigments.