Light as Energy
Science: Year 3 & 4 National Curriculum, topic 4.1.1
Light
Light is a form of energy. Humans and other animals need light to see.
Sources of light
- Light comes from different sources.
- The sun is our most important natural light source.
- Fire is another natural light source.
- Electric lights are a man-made light source.
Using light to see
- You are able to see when light comes from a light source and goes into our eyes.
- If there are no light sources then it is dark and we cannot see.
Seeing in the dark
- Sometimes people say it is dark but they can still see.
- These people can still see because there is still light coming from somewhere.
Closing your eyes
- When you close your eyes, the lids block most of the light but some light can still get through.
- Try closing your eyes and moving your hands over your eyelids and then away.
- You should see a change in the amount of light.
Test yourself on Light as Energy
Why are people able to see in the dark?
True or false?
You can still see light when you close your eyes.