How does light help us to see?
Shine light from a torch at the wall in a dark
room. Describe what you see.
Light bounces off the wall and enters the boy’s eyes.
This cup does not
produce its own light.
So how are you able
to see it?
Many things around us are not sources of
light. However, we can still see them because
they reflect light into our eyes.
When light bounces off from something, we
say that light is reflected.
...
In a dark room, shine light from a torch at
a mirror that your friend holds. Adjust the
mirror until you see a spot of light on the
wall. Explain what has happened to cause
light from the torch to fall on the wall.
The Moon does not give
off its own light. We
can see the Moon at
night because the Moon
reflects light from the
Sun into our eyes.
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Energy
J21
J21 EnergyTB_01Light&Shad..indd 6
8/8/07 9:05:04 PM