宇宙無限大

幾天下來收集了幾篇big-bang theory, 看了一堆關於今年物理學獎的討論

                                                                               

一直在想.. "宇宙" 到底是空間+時間? 範圍? 還是一個概念?

                                                                               

其中看到某個例子, 令我有茅塞頓開的感覺:

                                                                               

                                                                               

一顆氣球, 在我們三維眼光看來, 是個有限的實體

                                                                               

但在球面上爬的小螞蟻, 只能以二維方式移動

                                                                               

只要氣球不落地, 小螞蟻很可能永遠也爬不出去, 就以為牠所在的世界無限大

                                                                               

事實上, 牠從頭到尾都在一顆球上...

                                                                               

                                                                               

宇宙好比一顆氣球, 人類的渺小就好像在球面上爬的小螞蟻

                                                                               

宇宙的維度可能是四維﹑五維﹑...無限多維,

                                                                               

生活在三維(加入時間三維半)空間的我們, 當然無法體會多維宇宙是怎樣的型態

                                                                               

或許宇宙不是無限大, 只是在人類有限能力下, 利用三維移動找不到邊際



所以認為宇宙無限大(?)

                                                                               

                                                                               

可是如果宇宙是有限的話, 那宇宙的"外面"又是什麼勒?

                                                                               

我猜想, 多維空間只能抽象推理, 無法具體化來想像它的型態

                                                                               

自然也就沒有三維空間所謂的"裡"﹑"外"之分

                                                                               

也許未來還是需要有類似桑原的"次元刀", 才可望在這方面有所突破唄...XD