Tuesday 22nd March Colour

Colour White 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.

Red Magenta Yellow White Blue Green Cyan

Adding colours White 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 green makes cyan (light blue) Adding blue and red makes magenta (purple) Adding red and green makes yellow Adding all three makes white again

Task 1: Questions What are the 7 colours of white light? What are the 3 primary colours? Describe how cyan, magenta and yellow are formed?

Only red light is reflected Seeing colour The colour an object appears depends on the colours of light it reflects. For example, a red book only reflects red light: Homework White light Only red light is reflected

A white hat would reflect all seven colours: A pair of purple trousers would reflect purple light (and red and blue, as purple is made up of red and blue): Purple light A white hat would reflect all seven colours: White light

Task 2:Design an outfit Colour the outfit – different colours for the top, trousers shoes etc. Know describe how we see each of these colours

Task 3: Bill Nye colour

Using coloured light If we look at a coloured object in coloured light we see something different. For example, consider a football kit: Shirt looks red White light Shorts look blue

In different colours of light this kit would look different: Red light Shirt looks red Shorts look black Shirt looks black Blue light Shorts look blue

Homework Task 4: Complete Object Colour of light Colour object seems to be Red socks Red Blue Black Green Blue teddy Green camel Magenta book Homework

Homework Object Colour of light Colour object seems to be Red socks Blue Black Green Blue teddy Green camel black green Magenta book Homework

Make a note of this info Draw a diagram or picture Discuss Think Investigate Watch Answer question

Using filters Filters can be used to “block” out different colours of light: Red Filter Magenta Filter

Investigating filters Colour of filter Colours that could be “seen” Red Green Blue Cyan Magenta Yellow

Red Blue Green White Yellow Cyan Magenta