Why is the fire hydrant red?
In visible light, light of red lightThe longest, but the smallest angle, easily passes through the water, the rain, the dust, and the fog. Orange and yellow light are not afraid of obstruction,So the fire engines were painted red for the heavy fog and dusty surroundingsOr when a storm is blowing, let people see it from afar and make way for it to finish the fire fighting task as soon as possible
In short, if an object reflects one or more of the light of the sun, it absorbs itMore than light, then the object presents the color of the reflected monochromatic or polychromatic light
The sun is made up of seven colors, red, orange, yellow, green, blue, blue, and violet, each with its own wavelengths and anglesUnlike sunlight, which is applied to objects, different objects absorb and reflect different wavelengths of lightVarious colors are formed
