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  3. What is color? Why do some objects look red, others green, still others blue?

What is color? Why do some objects look red, others green, still others blue?

游客2023-10-07  13
问题    What is color? Why do some objects look red, others green, still others blue?
   Color is caused by  (11)  light rays. We see color because objects reflect light. Something that is red reflects  (12)  red light. It reflects a little green or blue light, too, but we do not see it. In the same way, a green object reflects mostly green light. White objects reflect  (13)  of light. Black objects do not reflect any light.
   What happens to the colors of light that are not reflected? They are absorbed by the object. The  (14)  the color, the less light is reflected and the more light is absorbed. Light that is absorbed is  (15)  heat. For this reason, dark-colored clothes are warmer in the sunlight than lighter-colored clothes.
What is color? Why de some objects look red, others green, still others blue?
   Color is caused by reflected light rays. We see color because objects reflect light. Something that is red reflects mostly red light. It reflects a little green or blue light, too, but we do not see it. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.
   What happens to the colors of light that are not reflected? They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than lighter-colored clothes.
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答案 reflected
解析 该题单独进行判断是不太容易的。但是空格中的词在全文中出现的次数很多，完全可以根据上下文进行判断。方法是：听清楚该词的发音，并随着录音的朗读，在下文中找到该词。另外，通过应用所学过的科学知识，也会对答案的选择有所帮助。
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