CHAPTER 1: LIGHT
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1 of 47 © Boardworks Ltd 2008
, 2
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,What is light?
Light is produced by the Sun,
and by objects such as light
bulbs and matches.
Light carries energy
and travels as a wave.
Light travels at a speed of
300,000,000 metres per
second, which is much faster
than the speed of sound.
Light waves travel in
straight lines.
3
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, Light energy
Light is a form of energy and can be changed from one form
into another.
Light energy can be used to make other useful forms of energy.
It can be converted into electrical energy in a solar cell or
chemical energy in the leaves of plants.
solar cell plants 4
4 of 47 © Boardworks Ltd 2008
1
1 of 47 © Boardworks Ltd 2008
, 2
2 of 47 © Boardworks Ltd 2008
,What is light?
Light is produced by the Sun,
and by objects such as light
bulbs and matches.
Light carries energy
and travels as a wave.
Light travels at a speed of
300,000,000 metres per
second, which is much faster
than the speed of sound.
Light waves travel in
straight lines.
3
3 of 47 © Boardworks Ltd 2008
, Light energy
Light is a form of energy and can be changed from one form
into another.
Light energy can be used to make other useful forms of energy.
It can be converted into electrical energy in a solar cell or
chemical energy in the leaves of plants.
solar cell plants 4
4 of 47 © Boardworks Ltd 2008
