Coloured Light Dispersion Colours Filters Seeing colour

4.____________________________________________________________ White Light? Shine a ray of white light at a TRIANGULAR PRISM, what do you observe? White light is split into a 1._______ of 2.________. This effect is called 3._________. Dispersion of white light What causes this effect? 4.____________________________________________________________ Red refracted less than violet

Exercise 1: White Light Label the colours on the diagram below. Can you think of a phrase that will help you remember the colours of the spectrum in order?

Exercise 2: White Light 1. What is dispersion? 2. Name the colours of the spectrum in order. 3. Which colour is refracted most moving from air to Perspex? 4. Which colour is refracted least moving from air to Perspex? 5. Give an example of dispersion in nature.

Exercise 3: Light Effects A. B. C. Reflection Refraction Dispersion

Colours There are 3 PRIMARY COLOURS, what are they? YELLOW MAGENTA CYAN MIXING the primary colours makes 3 SECONDARY COLOURS. What are they?

Filters - only let the colour pass that they are, all other colours are absorbed. PRIMARY FILTERS White Red White Green Red filter Green filter White Blue Blue filter

Secondary Filters Green Red Green Blue White White Yellow filter Cyan filter Red White Blue Magenta filter

Exercise 4: Filters Predict the colours that will emerge from the filter arrangements below. A. B. C. White White White

Exercise 5: Filters Predict the colours that will emerge from the filter arrangements below. A. B. C. Green Red Blue

What colour would a red and blue shirt look in blue light? Seeing Colour A red shirt looks red in white light because it absorbs all the colours except for red. Red is reflected. What colour would a red shirt look in blue light? It would look black because a red shirt ONLY reflects red. What colour would a red and blue shirt look in blue light?