以前的《自然》和现在的《科学》课中都安排有辐射吸热的探究性实验。有的教材是用黑白两个纸套戴在手上到太阳底下去体验,感觉两只手受热的程度;有的是把易拉罐剪成两半,一半涂成白色,一半涂成黑色,分别用凡士林将火柴棒黏到两块金属片上,然后在两金属片的正中点燃一支蜡烛作热源,看哪边的火柴棒先掉下来(图1),有的甚至就用一黑一白两个塑料袋来代替纸套做实验。 Radiation endothermic exploratory experiments were arranged in both previous “nature” and current “science” classes. Some textbooks are worn on the hands with black and white paper sets to experience the sun, feeling the extent of both hands heated; some are the cans cut in half, half painted white, half painted black, respectively, with Vaseline Stick stick stick to the two pieces of metal, and then in the middle of the two pieces of metal lit a candle as a heat source to see which side of the match stick first fall (Figure 1), and some even use a black and white two plastic bags To do the experiment instead of paper cover.