{"id":7958,"date":"2008-02-16T01:06:00","date_gmt":"2008-02-16T01:06:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=7958"},"modified":"2008-02-16T01:06:00","modified_gmt":"2008-02-16T01:06:00","slug":"%ec%a7%88%eb%9f%89%ea%b3%bc-%ec%97%90%eb%84%88%ec%a7%80","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=7958","title":{"rendered":"\uc9c8\ub7c9\uacfc \uc5d0\ub108\uc9c0"},"content":{"rendered":"
\n \uc9c8\ub7c9\uacfc \uc5d0\ub108\uc9c0\ub294 \uc65c \uac19\uc740 \uac1c\ub150\uc77c\uae4c?<\/p>\n

\ud2b9\uc218 \uc0c1\ub300\uc131 \uc774\ub860\uc5d0\uc11c\uc758 \uac00\uc815\uc740 \ub531 2\uac1c\uac00 \uc788\ub294\ub370 \ud558\ub098\ub294 \ubb3c\ub9ac \ubc95\uce59\uc740 \uad00\uc131\uacc4\uc5d0 \ub300\ud574 \ub3d9\uc77c\ud55c \ud615\ud0dc\ub97c \uc720\uc9c0\ud55c\ub2e4\ub294 \uac83\uc774\uace0, \ub2e4\ub978 \ud558\ub098\ub294 \ube5b\uc758 \uc18d\ub825\uc774 \ubb3c\ub9ac \ubc95\uce59\uc774\ub77c\ub294 \uc810\uc774\ub2e4.<\/p>\n

\uad00\uc131\uacc4\uac00 A\uc640 B\uac00 \uc788\ub2e4\uace0 \ud558\uace0, \uadf8 \uc0ac\uc774\uc758 \uc0c1\ub300\uc18d\ub3c4 \ucc28\uc774\uac00 u\ub77c\uace0 \ud558\uc790. \uadf8\ub7fc \ube5b\uc758 \uc18d\ub825\uc774 \uc720\ud55c\ud558\uace0 \uadf8 \uc18d\ub825\uc774 \uad00\ucc30\uc790\uc5d0 \ub300\ud574 \ud56d\uc0c1 \ub3d9\uc77c\ud574\uc57c \ud55c\ub2e4\ub294 \uac00\uc815\uc744 \ub9cc\uc871\uc2dc\ud0a4\uba74\uc11c \ubb3c\ub9ac \ubc95\uce59\uc758 \ud615\ud0dc\uac00 \ub3d9\uc77c\ud574\uc57c \ud55c\ub2e4\ub294 \uac00\uc815\ub3c4 \ub9cc\uc871\uc2dc\ud0a4\ub824\uba74 \ub450 \uad00\uc131\uacc4 \uc0ac\uc774\uc758 \uc88c\ud45c \ubcc0\ud658\uc740 \ub85c\ub80c\uce20 \ubcc0\ud658\uc744 \ub9cc\uc871\ud574\uc57c \ud55c\ub2e4. \ub85c\ub80c\uce20 \ubcc0\ud658\uc740 \uac08\ub9b4\ub808\uc774 \uc88c\ud45c \ubcc0\ud658\uacfc \uc57d\uac04 \uadf8 \ud615\ud0dc\uac00 \ub2e4\ub974\ub2e4.
\n
\n \uc5b4\uca0c\ub4e0 \uc5ec\uae30\uc11c \uc2dc\uac04 \uc9c0\uc5f0\uacfc \uae38\uc774 \uc218\ucd95 \ud604\uc0c1\uc774 \ud544\uc5f0\uc801\uc73c\ub85c \uc720\ub3c4\ub41c\ub2e4. \uc774\uc5d0 \ub300\ud55c \uc720\ub3c4\ub294 \ub2ec\ub9ac\ub294 \uae30\ucc28\uc5d0\uc11c \uce21\uc815\ud55c \ube5b\uc758 \uc18d\ub825\uacfc \uc9c0\uc0c1\uc5d0 \uba48\ucd98 \uc5ed\uc5d0\uc11c \uce21\uc815\ud55c \ube5b\uc758 \uc18d\ub825\uc774 \uac19\uc544\uc57c \ud55c\ub2e4\ub294 \uac00\uc815\uc744 \uc774\uc6a9\ud574\uc11c \ud53c\ud0c0\uace0\ub77c\uc2a4 \uc815\ub9ac\ub97c \uc0ac\uc6a9\ud558\uba74 \uac04\ub2e8\ud788 \uc720\ub3c4\ub41c\ub2e4.<\/p>\n

\uadf8\ub9ac\uace0, \uc5ec\uae30\uc5d0 \ub354\ubd88\uc5b4 \uc18d\ub3c4\uc758 \ub367\uc148 \uacf5\uc2dd\ub3c4 \ub2ec\ub77c\uc9c4\ub2e4. \uac08\ub9b4\ub808\uc774 \ubcc0\ud658\uc5d0\uc11c\ub294 \ub2e8\uc21c\ud788 \ub354\ud558\uae30\ub9cc \ud558\uba74 \ub418\uc5c8\uc73c\ub098, \ub85c\ub80c\uce20 \ubcc0\ud658\uc5d0\uc11c\ub294 \uad00\uc131\uacc4 A\uc5d0\uc11c \ubc14\ub77c\ubcf8 \uc18d\ub3c4\uac00 \uad00\uc131\uacc4 B\uc5d0\uc11c \ubc14\ub77c\ubcf8 \uc18d\ub3c4\uc640 \ub2e8\uc21c\ud788 u\ub9cc\ud07c\uc758 \ucc28\uc774\uac00 \ub098\ub294 \uac83\uc774 \uc544\ub2c8\ub2e4. u\ub9cc\ud07c\uc758 \ucc28\uc774\uc5d0 \uc5b4\ub5a4 \ub2e4\ub978 \uc22b\uc790\ub97c \uacf1\ud574\uc918\uc57c \ud55c\ub2e4. \uc774 \uc22b\uc790\ub294 \uc55e\uc5d0\uc11c \uc2dc\uac04 \uc9c0\uc5f0\uacfc \uae38\uc774 \uc218\ucd95 \ud604\uc0c1\uc5d0\uc11c \uc5bc\ub9c8\ub098 \uc904\uc5b4\ub4dc\ub294\uc9c0 \uc54c\ub824\uc8fc\ub294 \uc22b\uc790\uc640 \uac19\uc740 \uc5ed\ud560\uc744 \ud558\ub294 \uc22b\uc790\uc774\ub2e4. (\uac19\uc9c0\ub294 \uc54a\ub2e4. \uc57d\uac04 \ub2ec\ub77c\uc9c4\ub2e4. \uc774\uac83 \uc5ed\uc2dc \ucc45\uc744 \ucc3e\uc544\ubcf4\uc2dc\uae38 \ubc14\ub780\ub2e4.)<\/p>\n

\uc5ec\uae30\uc11c \ud55c\ubc1c \ub354 \ub098\uc544\uac00\uba74, \uc6b4\ub3d9\ub7c9 \uc5ed\uc2dc \uad00\ucc30\uc790\uc758 \uc18d\ub3c4\uc5d0 \ub530\ub77c \ub2e4\ub974\uac8c \ubcc0\ud658\ub418\uc5b4\uc57c \ud568\uc744 \uc54c \uc218 \uc788\uc744 \uac83\uc774\ub2e4. \ub2e8\uc21c\ud788 p=mv\ub77c\ub294 \uacf5\uc2dd\uc5d0 \uc758\ud574\uc11c \uc6b4\ub3d9\ub7c9 \ubcf4\uc874\uc744 \uae30\uc220\ud558\uba74 \uad00\ucc30\uc790\uac00 \ub2ec\ub77c\uc9c0\uac8c \ub418\ub294 \uacbd\uc6b0 \ub85c\ub80c\uce20 \ubcc0\ud658\uc5d0 \ub530\ub974\uba74 \uc6b4\ub3d9\ub7c9 \ubcf4\uc874\ubc95\uce59\uc774 \uae68\uc9c0\uac8c \ub41c\ub2e4. \uc6b4\ub3d9\ub7c9 \ubcf4\uc874 \ubc95\uce59\uc740 \ubb3c\ub9ac \ubc95\uce59\uc774\ubbc0\ub85c \uc0c1\ub300\uc131 \uc774\ub860\uc5d0 \uc758\ud558\uba74 \uadf8 \ud615\ud0dc\uac00 \uae68\uc838\uc11c\ub294 \uc548\ub41c\ub2e4. \ub530\ub77c\uc11c \uc6b4\ub3d9\ub7c9\uc774 p=mv\uac00 \uc544\ub2c8\ub77c\ub294 \uac83\uc774\ub2e4. \uc5ec\uae30\uc11c \ub2e4\uc2dc \uc0c1\ub300\ub860\uc5d0 \ub530\ub978 \uc6b4\ub3d9\ub7c9 \ubcf4\uc874\ubc95\uce59\uc744 \uc801\uc5b4\uc57c \ud558\ub294\ub370, \uc6b4\ub3d9\ub7c9\uc758 \uc815\uc758\ub97c \ubc14\uafb8\uac8c \ub41c\ub2e4. p=k(u)mv\ub77c\ub294 \ud615\ud0dc\ub85c, \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4 u\uc5d0 \uad00\ud55c \ub2e4\ub978 \ubcc0\ud658\uc778\uc790\uac00 \ucd94\uac00\ub41c \ud615\ud0dc\uac00 \ub41c\ub2e4. \uc5ec\uae30\uc11c \ub9cc\uc57d v\uac00 \uc18d\ub825\uc774\ub77c\ub294 \uace0\uc804\uc801\uc778 \uc815\uc758\ub97c \uace0\uce58\uc9c0 \uc54a\ub294\ub2e4\uace0 \ud558\uba74 \uc9c8\ub7c9 m\uc774 k(u)m\uc73c\ub85c \ubcc0\ud558\uac8c \ub41c\ub2e4. \uc989, \ub458 \uc911 \ud558\ub098\uac00 \ubc14\ub00c\uc9c0 \uc54a\uc73c\uba74 \uc6b4\ub3d9\ub7c9 \ubcf4\uc874\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294\ub2e4. (\uc815\ud655\ud788\ub294 \uc6b4\ub3d9\ub7c9\uc774 \ubc14\ub010 \uac83\uc774\uace0, \ub458 \uc911 \uc5b4\ub290 \ud558\ub098\uac00 \ub2e8\uc21c\ud788 \ubc14\ub010 \uac83\uc774 \uc544\ub2c8\ub2e4.)<\/p>\n

\uc6b4\ub3d9\ub7c9\uc744 \uc815\uc758\ud588\uc73c\uba74 \ud798\uc5d0 \ub300\ud574 \uc815\uc758\ud560 \uc218 \uc788\ub2e4. \ub274\ud134\uc758 \uc6b4\ub3d9\ubc95\uce59\uc5d0 \ub530\ub974\uba74 \ud798\uc740 \uc6b4\ub3d9\ub7c9\uc758 \uc2dc\uac04\uc5d0 \ub300\ud55c \ubcc0\ud654\uc728\ub85c \uc815\uc758\ub41c\ub2e4.(\uc808\ub300 F=ma\uac00 \uc544\ub2c8\ub2e4!) \ub530\ub77c\uc11c \uc6b4\ub3d9\ub7c9\uc744 \uc2dc\uac04\uc5d0 \ub300\ud574 \ubbf8\ubd84\ud558\uba74 \ud798\uc774 \ub098\ud0c0\ub09c\ub2e4.<\/p>\n

\uc774 \ud798\uc744 \uac16\uace0 \uc788\uc73c\uba74, \uc774\uc81c \uc77c\uacfc \uc5d0\ub108\uc9c0\uc5d0 \ub300\ud574 \uc54c \uc218 \uc788\uc744 \uac83\uc774\ub2e4. (\uc774 \uacfc\uc815\uc740 \uc9113 \uacfc\ud559\uc774\ub098 \uace0\ub4f1\ud559\uad50 \uacf5\ud1b5\uacfc\ud559\uc5d0\uc11c\ub3c4 \ub530\ub77c\uac00\ub294 \uacfc\uc815\ub4e4\uc774\ub2e4. \ub2e4\ub9cc \uadf8\uac83\uc774 \uc0c1\ub300\ub860\uc5d0 \ub530\ub77c\uc11c “\uc2dc\uac04”\uacfc “\uacf5\uac04”\uc758 \uc815\uc758\uac00 \ubc14\ub00c\uc5c8\uae30 \ub54c\ubb38\uc5d0 \ubcf5\uc7a1\ud574 \ubcf4\uc774\ub294 \uac83\uc5d0 \ubd88\uacfc\ud558\ub2e4.)
\n
\n \uc5b4\ub5a4 \ubb3c\uccb4\uc5d0 \uc791\uc6a9\ud55c \ud798\uc774 \ud55c \uc77c\uc740 \uadf8 \ubb3c\uccb4\uc758 \uc6b4\ub3d9\uc5d0\ub108\uc9c0 \ubcc0\ud654\ub7c9\uacfc \uac19\ub2e4.
\n
\n \uc5b4\ub5a4 \ubb3c\uccb4\uc5d0 \uc791\uc6a9\ud55c \ud798\uc774 \ud55c \uc77c\uc740 \ud798\uacfc \ubcc0\uc704\ub97c \uacf1\ud558\uc5ec \uc801\ubd84\ud55c \uac12\uc774\ub2e4.
\n
\n \ub530\ub77c\uc11c \ud798\uc744 \uc801\ubd84\ud558\uba74 \uc6b4\ub3d9\uc5d0\ub108\uc9c0 \ubcc0\ud654\ub7c9\uc774 \ub098\uc628\ub2e4. \ud798\uc758 \uc815\uc758\uc5d0 \ubd84\uba85 \uc6b4\ub3d9\ub7c9\uc774 \ud3ec\ud568\ub418\uace0, \uc6b4\ub3d9\ub7c9\uc740 \ub2e4\uc2dc \uc9c8\ub7c9\uacfc \uad00\uacc4\ub418\uae30 \ub54c\ubb38\uc5d0 \uc9c8\ub7c9\uacfc \uc5d0\ub108\uc9c0\uac00 \uad00\uacc4\uac00 \uc788\uac8c \ub41c\ub2e4. \uc5ec\uae30\uc11c \uadf8 \uc720\uba85\ud55c $T=\\gamma mc^2 – mc^2 = E-mc^2$\uc774\ub77c\ub294 \uacf5\uc2dd\uc774 \ub4f1\uc7a5\ud55c\ub2e4. $\\gamma$\ub294 \uc0c1\ub300\uc18d\ub3c4\uac00 0\uc77c\ub54c\ub294 1\uc5d0 \ud574\ub2f9\ud558\ub294 \uac12\uc774\uace0, \ub530\ub77c\uc11c \uc815\uc9c0\uc0c1\ud0dc\uc5d0\uc11c\uc758 \uc5d0\ub108\uc9c0\ub294 $E=mc^2$\uc774 \ub41c\ub2e4.<\/p>\n

\ud3b8\uc758\ub97c \uc704\ud574(\uadf8\ub9ac\uace0 \ud070 \uc758\ubbf8\ub97c \ub450\uc9c0 \uc54a\uace0) c=1\uc774\ub77c\uace0 \uc368\ubcf4\uc790.
\n
\n $E=m$
\n
\n \uc774\ub7f0 \ub73b\uc774 \ub41c\ub2e4. \uadf8\ub7fc c=1\uc774\ub77c\uace0 \uc4f4 \uac83\uc740 \uc5b4\ub5a4 \uc758\ubbf8\uc77c\uae4c? \uc6b0\ub9ac\ub294 \ud56d\uc0c1 \uce21\uc815\uc744 \ud560 \ub54c \ubb54\uac00 \ubcc0\ud558\uc9c0 \uc54a\ub294 \uac83\ub4e4\uc744 \uae30\uc900\uc73c\ub85c \uce21\uc815\uc744 \ud574 \uc654\ub2e4. \uac00\ub839, \uae38\uc774\uc758 \uae30\uc6d0\uc740 \ub2f9\uc2dc \uad6d\uc655\uc758 \ud314 \uae38\uc774\ub098 \ucf54 \uae38\uc774\ub098 \uc190\uac00\ub77d \uae38\uc774 \ub4f1\uc744 \uae30\uc900 \ub2e8\uc704\ub85c \uc0ac\uc6a9\ud588\uc5c8\ub2e4. \uc2dc\uac04\uc758 \uae30\uc900 \ub2e8\uc704\ub294 \uc9c4\uc790\uac00 \ud55c\ubc88 \ud754\ub4e4\ub9ac\ub294 \uc2dc\uac04\uc774\uc5c8\ub2e4. \uadf8\ub7ec\ub2e4\uac00 \uae30\uc220\uc774 \ubc1c\uc804\ud558\uc5ec \ube5b\uc758 \uc18d\ub825\uc744 \uc815\ud655\ud788 \uce21\uc815\ud560 \uc218 \uc788\uac8c \ub418\uc790, \ube5b\uc758 \uc18d\ub825\uc744 \ub2e8\uc704\ub85c \uc4f0\ub294 \uac83\uc774 \uc5b4\ub5a4\uac00 \ud558\ub294 \uc758\uacac\uc774 \ub098\uc628 \uac83\uc774\ub2e4. \uadf8\ub7fc \uc6b0\ub9ac\uac00 \uae30\uc900 \ub2e8\uc704\ub97c 1m, 1\uc778\uce58 \ub4f1\uc73c\ub85c \uc0ac\uc6a9\ud574\uc654\uc73c\ubbc0\ub85c \ube5b\uc758 \uc18d\ub825\uc744 \ub2e8\uc704\ub85c \uc4f4\ub2e4\uba74 1c\uac00 \ub2e8\uc704\uac00 \ub420 \uac83\uc774\ub2e4. c\uc5d0 \uc5b4\ub5a4 \uc758\ubbf8\ub97c \uc8fc\uc9c0 \uc54a\ub294\ub2e4\uba74 \uc6b0\ub9ac\ub294 \uadf8\ub0e5 1c\uac00 1\uc758 \ud06c\uae30\ub97c \uac16\ub294\ub2e4\uace0 \ubcfc \uc218 \uc788\uc744 \uac83\uc774\ub2e4. \ub530\ub77c\uc11c c=1\uc774\ub77c\uace0 \ub450\uace0 \uacc4\uc0b0\ud558\ub294 \uac83\uc774 \ud3b8\ub9ac\ud558\ub2e4. ($c=\\hbar=1$\uc774\ub77c\uace0 \ub450\ub294 \uac83\uc744 Natural Unit\uc774\ub77c\uace0 \ud558\uba70, \uc785\uc790 \ubb3c\ub9ac\ud559\uc790\ub4e4\uc740 \uc774 \ub2e8\uc704\uacc4\ub97c \uc120\ud638\ud55c\ub2e4.)<\/p>\n

\uc5b4\uca0c\ub4e0 \uacc4\uc0b0\uc740 \ub2e4 \ube7c\ub193\uace0 \ub17c\ub9ac\uc801 \uc21c\uc11c\ub9cc \ub530\ub77c\uc654\ub2e4. \uadc0\ucc2e\uc544\uc11c \uacc4\uc0b0\uc744 \ube90\ub2e4\uace0 \uc0dd\uac01\ud558\uba74 \ub418\uaca0\ub2e4.
\n
\n \uad00\uc2ec\uc788\ub294 \ub3c5\uc790\ub4e4\uc740 \uacc4\uc0b0\uc744 \ud55c\ubc88 \ub530\ub77c\ud574 \ubcf4\uba74 \uc88b\uc740 \uc5f0\uc2b5\uc774 \ub420 \uac83\uc774\ub2e4. (\uc0ac\uc2e4 \ub098\ub3c4 \uc548\ud574\ubcf4\uae34 \ud588\ub2e4…-_-;)
\n <\/p>\n

\n
\n
\n\"\uc2e0\uace0\"
\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\uc9c8\ub7c9\uacfc \uc5d0\ub108\uc9c0\ub294 \uc65c \uac19\uc740 \uac1c\ub150\uc77c\uae4c? \ud2b9\uc218 \uc0c1\ub300\uc131 \uc774\ub860\uc5d0\uc11c\uc758 \uac00\uc815\uc740 \ub531 2\uac1c\uac00 \uc788\ub294\ub370 \ud558\ub098\ub294 \ubb3c\ub9ac \ubc95\uce59\uc740 \uad00\uc131\uacc4\uc5d0 \ub300\ud574 \ub3d9\uc77c\ud55c \ud615\ud0dc\ub97c \uc720\uc9c0\ud55c\ub2e4\ub294 \uac83\uc774\uace0, \ub2e4\ub978 \ud558\ub098\ub294 \ube5b\uc758 \uc18d\ub825\uc774 \ubb3c\ub9ac \ubc95\uce59\uc774\ub77c\ub294 \uc810\uc774\ub2e4. \uad00\uc131\uacc4\uac00 A\uc640 B\uac00 \uc788\ub2e4\uace0 \ud558\uace0, \uadf8 \uc0ac\uc774\uc758 \uc0c1\ub300\uc18d\ub3c4 \ucc28\uc774\uac00 u\ub77c\uace0 \ud558\uc790. \uadf8\ub7fc \ube5b\uc758 \uc18d\ub825\uc774 \uc720\ud55c\ud558\uace0 \uadf8 \uc18d\ub825\uc774 \uad00\ucc30\uc790\uc5d0 \ub300\ud574 \ud56d\uc0c1 \ub3d9\uc77c\ud574\uc57c \ud55c\ub2e4\ub294 \uac00\uc815\uc744 \ub9cc\uc871\uc2dc\ud0a4\uba74\uc11c \ubb3c\ub9ac \ubc95\uce59\uc758 \ud615\ud0dc\uac00 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-7958","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-24m","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/7958","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7958"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/7958\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7958"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}