Polar Bear Trivia
Today, I will share some trivia about polar bears.
シロクマの雑学
The polar bear looks white, but the skin color is actually black, and the hair color is transparent.
今日はシロクマの雑学を紹介します。
If the body hair color is transparent, the heat of the sun will be absorbed effectively because light is transmitted easily through the hair.
シロクマは白く見えますが、実は肌の色は黒色で、毛の色は無色透明です。
Furthermore, the inside of the hair is hollow, and light is scattered, so it looks white, and it has an heat accumulation effect.
体毛が透明であれば光が透過するので、太陽の熱を取り込むことができます。
Since the body temperature of the polar bear is hardly released, there are very little infrared light that is radiated from the body, and it’s really difficult to capture the figure using an infrared camera.
さらに、シロクマの体毛は内部が空洞になっているため、散乱光によって白く見え、同時に蓄熱の効果も有します。
Also, the body hair, which looks white, plays a role of protective coloration, and polar bears seem to hide their black noses when they have a hunt.
シロクマは体温がほとんど外に逃げないので、体から輻射される赤外線が非常に少なく、赤外線カメラでその姿を捉えることが困難だそうです。
