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P4 Science LIGHT ENERGY

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by

tan haoxuan

on 8 June 2014

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Transcript of P4 Science LIGHT ENERGY

1. It travels in a straight line
2. It can be reflected
Light has properties

P4 Science LIGHT ENERGY
~Transparent object(most light passes through)
~Translucent object(little light passes through)
~Opaque object(NO light passes through)
There are different objects in this subject:
Eg.
Clear Glass
Clear Plastic
Transparent Objects(learn more)

Eg.
Frosted glass

Translucent materials allows little light to pass through.
Translucent Object(learn more)
Natural light sources. Man-made light source
There are TWO TYPES of light sources:

Transparent
Translucent
Opaque
Light passes through these but doesn't reflect.
That's WHY people hardly see the transparent objects
Of course, opaque objects allows NO LIGHT to pass through!
How do we see?
First, a light source will give out light rays and it reflects on an object.Then it will reflect into our eyes.
Sun
Wild fire

Firework
Electronic torchlight
Candle
Thank you for watching. See you in the next prez!XD
Full transcript