2011年3月30日 星期三

Explaining a Process-2

There is an interesting experiment which to show that black is a better collector of solar energy than white. All we have to prepare two tin cans, black and white paint, and room thermometer. First, paint the cans-one black, one white. Later, fill the cans with water. Besides, put the cans in direct sunlight for three hours. In the end, check the temperature of the water in the cans and compare. We can see that the temperature of the water in the black can is higher. This experiment tells us that the black is a better collector of solar energy than white.

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