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�씠寃껋�� X�꽑(X-Rays)�쓽 �뙆�룞�꽦怨� 寃곗젙�궡 �썝�옄�쓽 洹쒖튃�쟻�씤 諛곗뿴�쓣 �룞�떆�뿉 �엯利앺븳 怨꾧린媛� �릺湲곕룄 �븯����떎. 媛숈���빐 �쁺援��쓽 W.H. Bragg�뒗 �씠瑜� �떎瑜� 媛곷룄濡� �빐�꽍�븯�뿬 Laue媛� �궗�슜�뻽�뜕 �닔�떇蹂대떎 �뜑�슧 媛꾨떒�븳 �닔�떇�쑝濡� �쉶�젅�뿉 �븘�슂�븳 議곌굔�쓣 Bragg`s law (2 d Sin q = n l) 濡� �굹����궡�뿀�쑝硫�, �씠 X�꽑�쉶�젅�쁽�긽(X-Ray Diffraction)�쓣 �씠�슜�븯�뿬 媛곸쥌臾쇱쭏�쓽 寃곗젙援ъ“瑜� 諛앺엳�뒗�뜲 �꽦怨듯븯����떎.
�몢媛� �씠�긽�쓽 �뙆�룞 �궗�씠�뿉 �꽌濡� �쐞�긽李⑥씠媛� 洹� �뙆�룞�쓽 諛섑뙆�옣 留뚰겮 �엳�쓣 �븣�뒗 �꽌濡� �긽�뇙�릺�뼱 �뙆�룞�씠 �궗�씪吏��굹, �쐞�긽李⑥씠媛� �뙆�옣�쓽 �젙�닔諛� 留뚰겮 �엳�쓣�븣�뒗 吏꾪룺�씠 �몢諛곕줈 �릺�뼱�꽌 �꽭湲곌�� �뜑 �겕寃뚮맂�떎. �떎�쓬 洹몃┝�뿉�꽌 A�뿉�꽌 B源뚯���쓽 嫄곕━�뒗 d Sin q 媛� �릺硫�, �씠�뒗 B�뿉�꽌 C源뚯���쓽 嫄곕━����룄 媛숇떎. �뵲�씪�꽌, AB = BC = d Sin q �씠硫�, n l = 2 d Sin q 瑜� 留뚯”�븯硫� X�꽑(X-Rays)��� �쉶�젅(Diffraction)�릺�뼱 媛뺥븯寃� �굹����굹寃� �맂�떎.
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