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根据物理学的原理,光线在通过空气时会发生散射的作用,对于相同的媒质来说,光线的波长越短,散射的作用就会越强,反之,光线的波长越长,散射作用就会越弱。在所有的可见光中,红光的波长是最长的,约是紫光的1.7倍,所以空气对红光的散射作用最弱,它可以传播得更远。特别是在下雨或大雾的天气里,空气的透明度会大大降低,红光的这种作用就会更加明显了。使用红色信号灯作为停车的信号,在
According to the principle of physics, the light scattering occurs when passing through the air. For the same medium, the shorter the light wavelength, the stronger the scattering effect. On the contrary, the longer the light wavelength, the more the scattering function will be The weaker. In all the visible light, the red is the longest wavelength, about 1.7 times the violet, so the air of the red scattering the weakest, it can spread further. Especially in the rain or foggy weather, the transparency of the air will be greatly reduced, the red light will be more obvious. Use the red signal as a stop signal at