有些动物在夜间几乎什么都看不到,而猫头鹰在夜间却有很好的视力

有些动物在夜间几乎什么都看不到,而猫头鹰在夜间却有很好的视力,这是因为它对某种波段的光线能产生视觉.根据热辐射理论,物体发出的光的最大波长λm与物体的绝对温度T满足关系式Tλm=2.90×10-3 m·K.若猫头鹰的猎物——蛇在夜间体温为27 ℃,则它发出光的最大波长是多少?属于电磁波的哪个波段?

答案

解析:由Tλm=2.90×10-3 m·K

该波长属于红外线波段.

答案:9.7×10-6 m         红外线

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