What do we know about night? The answer is simple its is the absence of sunlight in the sky which is a result of continuous rotation of our planet causing the half of the earth to go in dark in front of our stationary sun. But is it all? There is question regarding the phenomena of getting dark. But don't bother about the answer which you may think when you suppose that I am going to ask "Why it gets dark after change in the source of light?" and you will answer me that "it is not the absolute absence of light but after the collision from a surface looses its ability to be visible and hence cannot light any object, so we experience darkness". But it is not the question I am going to ask, my question is about why the color of darkness is always black?