大象传媒

Some more everyday energy transfers

Image caption,
A candle
Image caption,
A microphone
Image caption,
A speaker
Image caption,
Sunlight on green leaves

A candle

Chemical energy \(\rightarrow\) light energy.

There is wasted heat energy as the candle burns.

A microphone

Sound energy \(\rightarrow\) electrical energy

A loudspeaker

Electrical energy \(\rightarrow\) sound energy.

There is wasted heat energy as the speaker becomes warm.

A green plant leaf

Light energy \(\rightarrow\) chemical energy.