1. Group 3 1B Kwong Man Ho Chan Ka Yi Tsui Siu Ngai Wo Kin Yi Members : Group Leader :

2. Humans used fuels to produce light in the ancient time.Light is a kind of energy which enables us to see things.Light energy can be used directly to produce light. Many energy can convert into light energy.The efficient use of light,apply in the design of buildings.Buildings are well designed in order to get more sunlight in,to save energy.

3. Examples We can light up the candles by matches, then we can get the light. Candles

4. Sun We only can see the sun in the morning, at night we can’t see it.It can give us the light.

5. It is very useful because most of things also need it just can get the light. Light bulb

6. Torch If we haven’t electrical energy, we can put some cells into them,then we can have light.

7. We can turn on the television if it has electrical energy,we can see light on it. Television

8. The End