why shadow is always black ?
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The Science department reacts to this phenomenon as In one place, the object blocks the light coming from the green bulb, leaving a blue shadow; in the other location it blocks the light from the blue bulb, leaving a green shadow. When you move the object close to the screen, the shadows overlap, leaving a very dark (black) shadow where the object blocks both lights.
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wherever there is no light it is all easy that all atoms or some dark matter are in stationary mode.so when there is an object which obstructs the light rays then the atoms in no light recieving zone imparts more darkness than surrounding regions which gets enough light. shadow is formed and is always black.
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