{"id":11689,"date":"2019-01-10T23:17:48","date_gmt":"2019-01-10T14:17:48","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=11689"},"modified":"2019-01-11T09:14:05","modified_gmt":"2019-01-11T00:14:05","slug":"%eb%b8%94%eb%9e%99%ed%99%80%ea%b3%bc-%ec%96%91%ec%9e%90%ec%bb%b4%ed%93%a8%ed%84%b01","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=11689","title":{"rendered":"\ube14\ub799\ud640\uacfc \uc591\uc790\ucef4\ud4e8\ud1301"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"> *\uc774 \uae00\uc758 \ub0b4\uc6a9\uc740 <strong>\uc2ec\uac01\ud558\uac8c <\/strong>\ud2c0\ub9b4 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. \uc624\ub958, \uc624\ud0c0 \ub4f1\uc5d0 \uad00\ud55c \uc9c0\uc801\uacfc \ud1a0\ub860 \ubc0f \uc9c8\ubb38\uc740 \uc5b8\uc81c\ub4e0\uc9c0 \ubb34\uc5c7\uc774\ub4e0\uc9c0 \ud658\uc601\ud569\ub2c8\ub2e4! <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc6b0\ub9ac \uc6b0\uc8fc\ub97c \uc124\uba85\ud558\ub294 \uc774\ub860\uc740 \ub450\uac00\uc9c0\ub85c \ub098\ub204\uc5b4\uc9c4\ub2e4. \ud558\ub098\ub294 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc774\uace0, \ub2e4\ub978 \ud558\ub098\ub294 \uc591\uc790\uc5ed\ud559\uc774\ub2e4. \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc740 \uc911\ub825\uacfc \uc2dc\uacf5\uac04 \uad00\ud55c \uc774\ub860\uc774\uace0, \uc591\uc790\uc5ed\ud559\uc740 \uc911\ub825\uacfc \uc2dc\uacf5\uac04\uc744 \uc81c\uc678\ud55c \ub098\uba38\uc9c0 \uc804\ubd80\uc5d0 \ub300\ud55c \uc774\ub860\uc774\ub2e4. \uc911\ub825, \uc2dc\uacf5\uac04, \uadf8\ub9ac\uace0 \ubaa8\ub4e0 \uac83\uc744 \uc124\uba85\ud560 \uc218 \uc788\ub294 \ud558\ub098\uc758 \uc774\ub860\uccb4\uacc4\ub294 \uc544\uc9c1 \ub9cc\ub4e4\uc5b4\uc9c0\uc9c0 \uc54a\uc558\uace0, \uc544\ub9c8 \ucd08\ub048\uc774\ub860\uc774 \uadf8\ub7f0 \ubaa8\ub4e0 \uac83\uc758 \uc774\ub860\uc774 \ub418\uc9c0 \uc54a\uc744\uae4c \ud558\ub294 \uae30\ub300\uc5d0 \ubd80\ud480\uc5b4 \uc788\uc744 \ubfd0\uc774\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294, \ube14\ub799\ud640\uc744 \uc774\uc6a9\ud574\uc11c \uc591\uc790\ucef4\ud4e8\ud305\uc744 \ud558\uaca0\ub2e4\ub294 \uc774\uc57c\uae30\uc5d0 \ub300\ud574 \uc18c\uac1c\ud558\ub824\uace0 \ud55c\ub2e4. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uba3c\uc800, \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uacfc \ube14\ub799\ud640\uc5d0 \uad00\ud55c \uc774\uc57c\uae30\ub85c \uc2dc\uc791\ud574 \ubcf4\uc790. \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc740 \uc911\ub825\uacfc \uc2dc\uacf5\uac04\uc5d0 \uad00\ud55c \uc774\ub860\uc778\ub370, \uc544\uc778\uc288\ud0c0\uc778 \uc7a5 \ubc29\uc815\uc2dd(Einstein&#8217;s field equation)\uc774 \uc8fc\uc5b4\uc838 \uc788\ub2e4. \uc774\uac83\uc740 4\ucc28\uc6d0 4\ucc28 \ud150\uc11c \ube44\uc120\ud615 2\ucc28 \ubbf8\ubd84 \ubc29\uc815\uc2dd\uc778\ub370, \uc27d\uac8c \ub9d0\ud574\uc11c \ubbf8\uc9c0\uc218\uac00 4*4*4*4\uac1c\uc778 \ube44\uc120\ud615 \uc5f0\ub9bd\ubbf8\ubd84\ubc29\uc815\uc2dd\uc774\ub77c\ub294 \ub73b\uc774\ub2e4. \ub300\uce6d\uc131 \ub54c\ubb38\uc5d0 \uadf8\ubcf4\ub2e4\ub294 \ub9ce\uc774 \uc904\uc5b4\ub4e4\uc9c0\ub9cc, \ubbf8\uc9c0\uc218 \uba87 \uac1c\uac00 \uc904\uc5b4\ub4e4\ub354\ub77c\ub3c4 \ud480\uae30 \uc5b4\ub824\uc6b4 \uac74 \ub9c8\ucc2c\uac00\uc9c0\uc774\ubbc0\ub85c \ub118\uc5b4\uac00\uc790. \uc544\uc778\uc288\ud0c0\uc778 \uc7a5 \ubc29\uc815\uc2dd\uc740 \uc9c8\ub7c9, \uc815\ud655\ud788\ub294 \uacf5\uac04\uc5d0 \ubd84\ud3ec\ud558\uace0 \uc788\ub294 \ubb3c\uc9c8\uc758 \ubc00\ub3c4\uac00 \uadf8 \uadfc\ubc29\uc758 \uc2dc\uacf5\uac04\uc758 \uace1\ub960\uc744 \uacb0\uc815\ud55c\ub2e4\ub294 \uac83\uc744 \uc774\uc57c\uae30\ud558\uace0 \uc788\ub2e4. \uc989, \ubc00\ub3c4\uac00 \ub192\uc73c\uba74 \uc2dc\uacf5\uac04\uc774 \ub9ce\uc774 \uc65c\uace1\ub418\uace0, \ubc00\ub3c4\uac00 \ub0ae\uc73c\uba74 \ud3c9\ud3c9\ud55c \uc2dc\uacf5\uac04\uc774 \ub41c\ub2e4\ub294 \uac83\uc774\ub2e4. \uadf8\ub7fc, \ud3c9\ud3c9\ud55c \uc2dc\uacf5\uac04\uacfc \uc65c\uace1\ub41c \uc2dc\uacf5\uac04\uc774\ub780 \ubb34\uc5c7\uc77c\uae4c? \uad6c\ubd80\ub7ec\uc9c4 \uc2dc\uacf5\uac04\uc5d0\uc11c\ub294 \uad6c\ubd80\ub7ec\uc838\uc11c \uc6c0\uc9c1\uc774\uace0, \ud3c9\ud3c9\ud55c \uc2dc\uacf5\uac04\uc5d0\uc11c\ub294 \uad6c\ubd80\ub7ec\uc9c0\uc9c0 \uc54a\uace0 \uc6c0\uc9c1\uc778\ub2e4. \ubb34\uc5c7\uc774? \ube5b\uc774!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud2b9\uc218\uc0c1\ub300\uc131\uc774\ub860\uc5d0\uc11c\ub294 \uad00\uc131\uacc4(Inertial frame)\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \uc77c\ub4e4\uc744 \ub2e4\ub8ec\ub2e4. \uad00\uc131\uacc4\ub780, \uad00\uc131\uc758 \ubc95\uce59\uc774 \uc131\ub9bd\ud558\ub294 \uad00\ucc30\uacc4\ub97c \ub9d0\ud55c\ub2e4. \uad00\uc131\uc758 \ubc95\uce59\uc740 \uace0\ub4f1\ud559\uad50 \ub54c \ubc30\uc6b0\ub294 \ub274\ud134\uc758 3\uac00\uc9c0 \uc6b4\ub3d9\ubc95\uce59 \uc911 \uccab\ubc88\uc9f8 \ubc95\uce59\uc774\ub2e4. \uc774\uac83\uc740 \uc678\ubd80\uc5d0\uc11c \ud798\uc774 \uc791\uc6a9\ud558\uc9c0 \uc54a\uc73c\uba74 \ubb3c\uccb4\uc758 \uc6b4\ub3d9\uc0c1\ud0dc \ubcc0\ud654\uac00 \uc5c6\ub2e4\uace0 \ud558\ub294 \ubc95\uce59\uc774\ub2e4. \ubc18\ub300\ub85c, \uc6b4\ub3d9\uc0c1\ud0dc\uac00 \ubcc0\ud558\uba74 \uc678\ubd80\uc5d0\uc11c \ubc18\ub4dc\uc2dc \ud798\uc774 \uc791\uc6a9\ud588\uc74c\uc744 \uc54c \uc218 \uc788\ub294\ub370, \uc774\uac83\uc740 \ub450\ubc88\uc9f8 \ubc95\uce59\uc778 \ud798\uacfc \uac00\uc18d\ub3c4\uc758 \ubc95\uce59\uc774\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc6b4\ub3d9\uc0c1\ud0dc\ub780 \ubb34\uc5c7\uc77c\uae4c? \uc6b4\ub3d9\uc0c1\ud0dc\ub294 \uc6b4\ub3d9\ub7c9\uc774\ub2e4. \uc6b4\ub3d9\ub7c9\uc740 \ubb3c\uccb4\uac00 \uc5bc\ub9c8\ub098 \ube60\ub974\uac8c, \uadf8\ub9ac\uace0 \ubb35\uc9c1\ud558\uac8c \uc6c0\uc9c1\uc774\uace0 \uc788\ub294\uc9c0 \uc54c\ub824\uc8fc\ub294 \ucc99\ub3c4\uc778\ub370, \ubd80\uc815\ud655\ud55c \ud45c\ud604\uc774\uae30\ub294 \ud558\uc9c0\ub9cc \ub300\uccb4\ub85c \ubb3c\uccb4\uc758 \uc18d\ub3c4\uc640 \uc9c8\ub7c9\uc758 \uacf1\uc73c\ub85c \ud45c\ud604\ud55c\ub2e4. \ubb3c\uccb4\uc758 \uc6b4\ub3d9\uc0c1\ud0dc \ubcc0\ud654\ub77c\ub294 \uac83\uc740 \ubb3c\uccb4\uc758 \uc9c8\ub7c9\uc774 \ubcc0\ud558\uac70\ub098 \uc18d\ub3c4\uac00 \ubcc0\ud55c\ub2e4\ub294 \ub73b\uc774\ub2e4. \uc989, \uc5b4\ub5a4 \ubb3c\uccb4\ub97c \uac00\ub9cc\ud788 \ubcf4\uace0\ub9cc \uc788\uc5c8\ub294\ub370 \uadf8 \ubb3c\uccb4\uc758 \uc9c8\ub7c9\uc774 \ubcc0\ud558\uac70\ub098, \ub354 \ube68\ub77c\uc9c0\uac70\ub098, \ub354 \ub290\ub824\uc9c0\uac70\ub098, \uc6c0\uc9c1\uc774\ub294 \ubc29\ud5a5\uc774 \ubc14\ub010\ub2e4\uba74, \ub2f9\uc2e0\uc740 \uad00\uc131\uacc4\uc5d0 \uc788\ub294 \uac83\uc774 \uc544\ub2c8\ub2e4. \ubb3c\ub860 \uc544\ubb34\uac83\ub3c4 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4\uba74 \ub2f9\uc2e0\uc740 \uad00\uc131\uacc4\uc5d0 \uc788\ub2e4\uace0 \ubd10\ub3c4 \uc88b\ub2e4. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud2b9\uc218\uc0c1\ub300\uc131\uc774\ub860\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294 \uc0c1\ud669, \uc989 \uad00\uc131\uacc4\uac00 \uc544\ub2cc \uacbd\uc6b0 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc744 \uc0ac\uc6a9\ud574\uc57c \ud55c\ub2e4. \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc5d0\uc11c\ub294 \uad00\uc131\uc758 \ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294 \uacbd\uc6b0\uae4c\uc9c0\ub3c4 \ub2e4\ub8f0 \uc218 \uc788\ub294\ub370, \ub2e4\uc2dc \ub9d0\ud574\uc11c \uac00\ub9cc\ud788 \ubcf4\uace0 \uc788\ub294\ub370 \uba48\ucdb0\uc788\ub358 \ubb3c\uccb4\uac00 \uac11\uc790\uae30 \uc6c0\uc9c1\uc778\ub2e4\uac70\ub098 \uc6c0\uc9c1\uc774\ub358 \ubb3c\uccb4\uac00 \uac00\ub358 \ubc29\ud5a5\uc744 \ubc14\uafbc\ub2e4\uac70\ub098 \ud558\ub294 \uc77c\uc774 \ubc1c\uc0dd\ud558\ub294 \uc0c1\ud669\uc774\ub2e4. \uc774\ub7f0 \uacbd\uc6b0, \uc774 \ubb3c\uccb4\uc5d0 \uc5b4\ub5a4 \uc77c\uc774 \uc77c\uc5b4\ub098\ub294\uac00\ub97c \uc815\ud655\ud788 \uc124\uba85\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc2dc\uacf5\uac04\uc758 \uc65c\uace1\uacfc \uc9c8\ub7c9\uc758 \ubd84\ud3ec\ub77c\uace0 \ud558\ub294 \uad49\uc7a5\ud788 \uac70\ucc3d\ud55c \uac1c\ub150\uc744 \ub4e4\uace0 \uc640\uc57c \ud55c\ub2e4. \uc0ac\uc2e4 \uc6b0\ub9ac \uc8fc\ubcc0\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \uc774\ub7f0 \ud604\uc0c1\ub4e4\uc740 \uad73\uc774 \uc774 \ub2e8\uacc4\uae4c\uc9c0 \uac00\uc9c0 \uc54a\ub354\ub77c\ub3c4 \ub274\ud134\uc758 \uc6b4\ub3d9 \ubc29\uc815\uc2dd\uacfc \ub274\ud134\uc758 \uc911\ub825 \ubc29\uc815\uc2dd\uc744 \uc774\uc6a9\ud574\uc11c \uc798 \uc124\uba85\ud558\uace0 \uc608\uce21\ud560 \uc218 \uc788\ub2e4. \ud558\uc9c0\ub9cc \uc6b0\ub9ac \uc6b0\uc8fc\uc5d0\ub294 \uadf8\ub807\uac8c \uc26c\uc6b4 \ubb38\uc81c\ub9cc \uc788\ub294 \uac83\uc774 \uc544\ub2c8\uc5b4\uc11c, \ub274\ud134 \uc5ed\ud559\uc73c\ub85c\ub294 \uc124\uba85\ud560 \uc218 \uc5c6\ub294 \uac83\ub4e4\uc774 \ub9ce\uc774 \uc788\ub2e4. \uadf8 \uc911 \ud558\ub098\uac00 \ube14\ub799\ud640\uc774\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc911\ub825\uc740 \ub9e4\uc6b0 \uc57d\ud55c \ud798\uc774\ub77c\uc11c, \uc9c0\uad6c \uc911\ub825\uc758 \uacbd\uc6b0 \uc0ac\ub78c\uc774 \uc870\uae08\ub9cc \ud798\uc744 \uc4f0\uba74 \ub545\ubc14\ub2e5\uc758 \ub3cc\uba69\uc774\ub97c \ub4e4\uc5b4\uc62c\ub9b4 \uc218 \uc788\ub2e4. \uc804\uc790\uae30\ub825\uc740 \ubc18\ub300\ub85c \ub9e4\uc6b0 \uac15\ub825\ud558\uac8c \uc791\uc6a9\ud560 \uc218 \uc788\ub294\ub370, \uac15\ub825\ud55c \ub124\uc624\ub514\ubbb4 \uc790\uc11d\uc740 \ud55c\ubc88 \ucca0\ud310\uc5d0 \ub2ec\ub77c\ubd99\uc73c\uba74 \ub5bc\uc5b4\ub0b4\uae30\uac00 \ub9e4\uc6b0 \ud798\ub4e4\uc5b4\uc9c4\ub2e4. \ud558\uc9c0\ub9cc, \ub9e4\uc6b0 \uba3c \uac70\ub9ac, \uac00\ub839 \uc6b0\uc8fc\uc5d0 \ub5a0\ub2e4\ub2c8\ub294 \ubcc4\uacfc \ubcc4 \uc0ac\uc774\uc758 \uac70\ub9ac, \uc815\ub3c4\uc758 \uaddc\ubaa8\ub85c \uba40\uc5b4\uc9c0\uac8c \ub418\uba74 \uc0c1\ud669\uc774 \uc5ed\uc804\ub41c\ub2e4. \uc804\uc790\uae30\ub825\uc740 \uc74c\uadf9\uacfc \uc591\uadf9\uc774 \uc788\uace0, N\uadf9\uacfc S\uadf9\uc774 \uc788\uc5b4\uc11c \uba40\uc5b4\uc9c0\uba74 \uba40\uc5b4\uc9c8\uc218\ub85d \uc0c1\uc1c4\ub418\uace0 \uc57d\ud574\uc9c0\ub294\ub370, \uc911\ub825\uc740 \uadf8 \ud798\uc744 \uc0c1\uc1c4\uc2dc\ud0ac\ub9cc\ud55c \ucc99\ub825\uc774 \uc5c6\ub2e4\ubcf4\ub2c8 \ub9e4\uc6b0 \ud070 \uaddc\ubaa8\uc5d0\uc11c\ub294 \uc9c0\ubc30\uc801\uc73c\ub85c \uc791\uc6a9\ud558\ub294 \ud798\uc774 \ub41c\ub2e4. \uadf8\ub7ec\ub2e4\ubcf4\ub2c8, \uc6b0\uc8fc\uc5d0 \uc874\uc7ac\ud558\ub294 \uac00\uc2a4, \uad6c\ub984, \uc548\uac1c\uc640 \uac19\uc740 \uac83\ub4e4\uc774 \ub9e4\uc6b0 \uc624\ub79c \uc2dc\uac04\uc5d0 \uc9c0\ub098\uba74\uc11c \uc810\uc810 \ubb49\uce58\uace0, \uadf8 \uacb0\uacfc \ubcc4\uc774 \ud0c4\uc0dd\ud55c \uac83\uc774\ub2e4. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ubcc4\uc740 \uc911\ub825\uc5d0 \uc758\ud574 \ubb3c\uc9c8\uc774 \ubb49\uccd0\uc11c \ub9cc\ub4e4\uc5b4 \uc9c4 \uac83\uc774\ub2e4. \ud0dc\ucd08\uc5d0 \uac00\uc2a4\uac00 \uc6b0\uc8fc\uc5d0 \ud37c\uc838 \uc788\uc5c8\ub294\ub370, \ub300\uccb4\ub85c \uace8\uace0\ub8e8 \ud37c\uc838 \uc788\uc5c8\uaca0\uc9c0\ub9cc, \uc544\uc8fc \uc791\uc740 \ubc00\ub3c4 \ucc28\uc774\uac00 \uc788\uc5c8\uc744 \uc218\ub3c4 \uc788\ub2e4. \uadf8\ub807\ub2e4\uace0 \ud558\uba74, \uadf8 \uc911 \ubc00\ub3c4\uac00 \ub192\uc740 \ubd80\ubd84\uc740 \uc911\ub825\uc774 \uac15\ud574\uc11c \uac00\uc2a4 \ubb3c\uc9c8\uc744 \ub04c\uc5b4\ub2f9\uae30\uace0, \uadf8\ub7ec\ub2e4\ubcf4\uba74 \ubc00\ub3c4\uac00 \ub192\uc544\uc9c0\ub2c8\uae4c \uc810\uc810 \uc911\ub825\uc774 \uac15\ud574\uc9c0\uace0, \uadf8\ub807\uac8c \uc911\ub825\ub3c4 \uac15\ud574\uc9c0\uace0 \ubc00\ub3c4\ub3c4 \uc810\uc810 \ub192\uc544\uc9c0\ub294 \uacfc\uc815\uc774 \ubc18\ubcf5\ub418\uba74\uc11c \ucee4\ub2e4\ub780 \ub369\uc5b4\ub9ac\ub97c \ud615\uc131\ud558\uac8c \ub41c\ub2e4. \ub9cc\uc57d \uc774 \uc0c1\ud0dc\ub85c \uadf8\ub300\ub85c \uc800\ud56d \uc5c6\uc774 \ubb49\uce58\uac8c \ub41c\ub2e4\uba74 \ud55c \uc810\uc73c\ub85c \ubaa8\uc774\uac8c \ub420 \uac83\uc774\ub2e4. \ud558\uc9c0\ub9cc \uc2e4\uc81c\ub85c\ub294 \uadf8\ub807\uac8c \ub418\uae30 \uc804\uc5d0 \ubc29\ud574\ub97c \ubc1b\uac8c \ub418\ub294\ub370, \ubc14\ub85c \uc5f4 \uc5d0\ub108\uc9c0\uc774\ub2e4. \uc911\ub825\uc5d0 \uc758\ud574\uc11c \uac00\uc2a4\uac00 \uc810\uc810 \ubb49\uce5c\ub2e4\ub294 \uac83\uc740 \ubd80\ud53c\uac00 \uc791\uc544\uc9c4\ub2e4\ub294 \ub73b\uc774\ub2e4. \uae30\uccb4\uc758 \ubd80\ud53c\uac00 \uc791\uc544\uc9c0\uba74 \uc555\ub825\uc774 \uc62c\ub77c\uac00\uace0, \ub3d9\uc2dc\uc5d0 \uc628\ub3c4\ub3c4 \uc62c\ub77c\uac00\uac8c \ub41c\ub2e4. \uc774 \ub54c \uc5f4 \uc5d0\ub108\uc9c0\ub294 \uc911\ub825\uc5d0 \uc758\ud55c \uc704\uce58\uc5d0\ub108\uc9c0\ub85c\ubd80\ud130 \uacf5\uae09\ub41c\ub2e4. \uadf8\ub9ac\uace0 \uadf8\ub807\uac8c \uc810\uc810 \ub728\uac70\uc6cc\uc9c4 \uac00\uc2a4\ub294 \uc5f4 \uc5d0\ub108\uc9c0\uc5d0 \uc758\ud55c \uc555\ub825\uc774 \uc911\ub825\uc5d0 \uc758\ud55c \uc555\ub825\uc744 \ub9de\uc11c\uc11c \ubc84\ud2f8 \uc218 \uc788\uc744 \ub54c \uae4c\uc9c0 \uc218\ucd95\ud55c\ub2e4. \ub9cc\uc57d \uac00\uc2a4\uc758 \uc911\ub825\uc774 \ucda9\ubd84\ud788 \ud06c\ub2e4\uba74, \uc5f4 \uc5d0\ub108\uc9c0\uc5d0 \uc758\ud55c \uc555\ub825\uc744 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