有人对四千多种花的颜色进行过统计,发现只有8种黑色花;而且还不是地道的黑色,只是蓝紫偏黑罢了。科学家认为,黑花稀少与太阳光有关。我们知,太阳光由7种光色组成,光波长短不同,其所含量也不同———红、橙、黄为长波光,含热量多;青、紫为短波光,含热量少。花的各部尤其是花瓣 Some people have analyzed the colors of more than 4,000 kinds of flowers and found that there are only 8 kinds of black flowers; and it is not authentic black, but it is dark blue and black. Scientists believe that black flowers are scarcely associated with sunlight. We know that sunlight consists of seven light colors. The wavelengths of light are different, and their contents are also different—the red, orange, and yellow are long wavelengths of light and contain more heat; blue and purple are short-wave light and contain less heat. The various parts of the flower, especially the petals