Shadow is an optical phenomenon. Light travels in a straight line in a homogeneous medium, and when light encounters an opaque object, it produces a projection, which is what we call a shadow. Since the shadow is a phenomenon, the shadow naturally has no weight. However, scientists have discovered an interesting fact, although shadows do not have weight, but when the shadow is projected on the object, it will reduce the weight of the object, why? Poke video to understand ↓↓↓(Xinhua News Agency)
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![Xiaomi Mi, since I started, I insisted on it, come on [rabbit] The shadow of the story of "Asking Zi Ankang" has been in my heart for a long time, when I first watched "Those Things of the Ming Dynasty", I felt that they were all tilted towards each other[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)