Light from bonfires to lasers

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3

Fairy lights

Slide 37

Uses

Lasers- produce very bright beams of light.

The atoms all give out their light together

CDs use laser light

and reflection-

Slide 38

CDs

The surface has tiny pits and smooth bits

in a spiral pattern

the pits scatter light from a laser

the smooth bits reflect the light

so a coded message is read.

spiral

Slide 39

Laser show

Physics is in everything