Light from bonfires to lasers

Page
2

Light is reflected.

You can see a reflection.

Slide 17

Change the direction of the light beam

Light is still reflected.

You see a reflection

- in a different

direction.

Slide 18

Multiple reflections

The lamp hangs between two large mirrors on opposite walls.

The reflection in the first mirror is reflected in the second mirror, which is reflected again in the first mirror - - -

Slide 19

Now for some games !

Slide 20

Colour

Slide 21

Sunlight shining on CDs

Where do the colours come from?

Slide 22

Rainbow

red

orange

yellow

green

blue

indigo

violet

Slide 23

Colours

White light is made up of lots of colours

Slide 24

Colours from white light

Look at a lamp through the grating.

You will see colours.

Slide 25

red

Slide 26

Slide 27

blue

Slide 28

Adding colours with light

This is different to adding paints

Slide 29

Red + Blue

 magenta

Slide 30

Blue + Green

 cyan

Slide 31

Green + Red

 yellow

Slide 32

Slide 33

yellow

Slide 34

magenta

Slide 35

cyan

Slide 36