作者：ted132
錯了 不會變黑洞不是因為質量問題 是因為半徑問題 地球只要縮小到約銅板大小就會變成黑洞 黑洞是引力極強 未必質量極大 你只要回想高中教的重力位能 r足夠小時它受到的引力就會極大 此時連光所擁有的能量也無法逃離這個重力位能 才會把它叫做黑洞 p.s.沒記錯的話太陽只要縮到足球場大小就夠了
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- Title: 《[what if]第46期：保龄球和地球》的评论
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