2011年3月30日 星期三

Explaining a Process - 2

There is a simple experiment which can show that black is a better collector of solar energy than white. All you have to prepare is 2 tin cans, black and white paint and a room thermometer. The first thing you should do is to paint the cans – one black, one white. Next, fill the cans with water. Then, put the cans in direct sunlight for three hours. Finally, check the temperature of the water in the cans and compare. After following the steps above, you will find that the temperature of the water in the black can is higher. This can easily prove that black is able to collect more solar energy than white.

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