2 ColourWhite light is not a single colour; it is made up of a mixture of the seven colours of the rainbow.We can demonstrate this by splitting white light with a prism:This is how rainbows are formed: sunlight is “split up” by raindrops.
3 The colours of the rainbow: RedOrangeYellowGreenBlueIndigoVioletR O Y G. B I V
4 Adding coloursWhite light can be split up to make separate colours. These colours can be added together again.The primary colours of light are red, blue and green:Adding blue and red makes magenta (purple)Adding blue and green makes cyan (light blue)Adding red and green makes yellowAdding all three makes white again
5 Only red light is reflected Seeing colourThe colour an object appears depends on the colours of light it reflects.For example, a red book only reflects red light:HomeworkWhitelightOnly red light is reflected
6 A pair of purple pants would reflect purple light (and red and blue, as purple is made up of red and blue):Purple lightA white hat would reflect all seven colours:Whitelight
7 Using coloured lightIf we look at a coloured object in coloured light we see something different.Shirt looks redWhitelightShorts look blue
8 In different colours of light this kit would look different: RedlightShirt looks redShorts look blackShirt looks blackBluelightShorts look blue
9 WHITE is the REFLECTION of all colours. And SO>>>WHITE is the REFLECTION of all colours.AndBLACK is the ABSORBTION of all colours.
10 Some further examples: ObjectColour of lightColour object seems to beRed socksRedBlueBlackGreenBlue teddyGreen camelMagenta bookHomework
11 Using filters Red Filter Filters can be used to “block” out different colours of light:Red FilterGreen Filter