why is the sky blue
A curious child often asked the first question is: why is the sky blue? However, no matter how common this problem is, there are many misunderstandings and wrong answers: because it reflects the ocean, because oxygen is blue gas, because the sun is blue, and the correct answer is often overlooked. The reason why the sky is blue is because three simple factors are combined: the sun is composed of many different wavelengths of light, the Earth's atmosphere is composed of different wavelengths of light molecules, their size is different , Our eyes are also very sensitive to put these three things together, the blue sky is inevitable to show. The sun is made up of all the different colors of light ... Our sun's light sphere is very hot, close to 6000 K, it emits a broad spectrum of light from the highest energy of the UV to visible, from purple to red, and then goes deep To the infrared part of the spectrum. The highest energy light is also short wavelength (and high frequency) ...