关于电磁场与电磁波的问题
\u5173\u4e8e\u7535\u78c1\u573a\u4e0e\u7535\u78c1\u6ce2\u7684\u95ee\u9898\u662f\u53d8\u5316\u4e2d\u7684\u7535\u573a\u4ea7\u751f\u78c1\u573a,\u53d8\u5316\u4e2d\u7684\u78c1\u573a\u4ea7\u751f\u7535\u573a,\u4f60\u4e0d\u8981\u641e\u9519.
\u55ef\uff0c\u8fd0\u52a8\u7535\u8377\u65e2\u4f1a\u4ea7\u751f\u7535\u573a\uff0c\u53c8\u4f1a\u4ea7\u751f\u78c1\u573a \u3002\u7535\u8377\u8fd0\u4e0d\u8fd0\u52a8\u90fd\u4f1a\u4ea7\u751f\u7535\u573a\uff0c\u8fd0\u52a8\u7684\u7535\u8377\u4ea7\u751f\u53d8\u5316\u7684\u7535\u573a\uff0c\u53d8\u5316\u7684\u7535\u573a\u4ea7\u751f\u78c1\u573a\u3002 \u201c\u6df7\u5408\u201d\u7684\uff0c\u53d8\u5316\u7684\u7535\u573a\u4ea7\u751f\u78c1\u573a\uff0c\u53d8\u5316\u7684\u78c1\u573a\u4ea7\u751f\u7535\u573a\uff0c\u8fd9\u6837\u5b83\u4eec\u5c31\u6df7\u5408\u7684; \u5f53\u7136\u662f\u4e00\u79cd\u65b0\u7684\u573a\u3002\u7535\u573a\u4e0e\u78c1\u573a\u7684\u7b80\u5355\u6df7\u5408\u5f53\u7136\u4e0d\u80fd\u7b97\u7535\u78c1\u573a
不重复。因为振幅指的是平面波的场强最大处的值，而每一点都各有其场强。以正弦波为例，场强大小=振幅乘以sinωt的绝对值
绛旓細杩欓噷鐨凟鎸囩殑鏄渶澶х殑鎰熷簲鐢靛姩鍔 褰撶嚎妗嗘墍鍦ㄥ钩闈笌纾佹劅绾垮钩琛屾椂 鏈変袱鏉¤竟鐨勯熷害鏂瑰悜鍨傜洿浜庣鎰熺嚎 姝ゆ椂鐨勬劅搴旂數鍔ㄥ娍鏈澶 鏍规嵁鍏紡E=BLV 璁剧嚎妗嗛潰绉负S 涓ゆ潯杈瑰垎鍒暱L1 L2 鍏朵腑L1閫熷害鏂瑰悜鍨傜洿浜庣鎰熺嚎 鍒欐湁 姣忔潯L1鐨勯熷害涓篤=W*R R=L2/2 鎵浠=W*L2/2 鎵浠ユ瘡鏉1鐨勭數鍔ㄥ娍E1=BL1*V=BL1*...
绛旓細鎵浠ワ紝鎴戜滑閫氬父瑕佸涓鑸殑鐢电娉㈣繘琛屽睆钄界殑鏃跺欙紝闈炲父绠鍗曠殑鎷夸釜閲戝睘缃╀綇灏辫浜嗐傚鏋鐢电娉㈢殑鑳介噺瓒冲澶э紝浣犲氨鍙互鐪嬪埌娉㈢殑浼犳挱浜嗭紝楂樹腑鎴栧ぇ瀛︾殑璇曢獙瀹ゅ彲浠ユ彁渚涙尝鍦ㄥ浐浣撶墿璐ㄤ紶鎾殑璇曢獙銆傚儚浣犳墍璇寸殑锛岀數纾佹尝鏄敱鐢电鍦鎵板姩褰㈡垚鐨勶紝鎵浠ュ氨鏄洜涓烘湁浜嗙數纾佸満鐨勪綔鐢ㄦ墠鏈変簡鐢电娉㈢殑浼犳挱锛屾墍浠ョ數纾佸満涓嶈浣...
绛旓細鍒嗙被: 鐞嗗伐瀛︾ >> 宸ョ▼鎶鏈瀛 闂鎻忚堪:鎴戞兂闂竴涓嬬數纾佹尝涓庣數纾佸満鏈変粈涔堝ソ澶勫拰鍧忓锛屾垜鎯虫眰涓浜涚浉鍏崇殑鏂囩尞锛屾渶濂芥湁涓浜涗緥瀛愶紝姣斿鎵嬫満锛岄浄杈剧瓑绛夈傝В鏋:鐢电娉㈠ソ澶勶細鍙互鎶婁俊鍙蜂紶鍒板緢杩滅殑鍦版柟锛屾墜鏈恒佹敹闊虫満銆佺數瑙嗐佸璁叉満銆佺瓑閮芥槸鍒╃敤鐢电娉㈢殑渚嬪瓙銆傚潖澶勶細杩戣窛绂诲ぇ鍔熺巼鐨勭數纾佹尝杈愬皠锛屽浜轰綋鏈夊奖鍝...
绛旓細浣撳垎甯冩潫缂氱數鑽峰瓨鍦ㄧ殑鏉′欢锛氶潪鍧囧寑浠嬭川鎴栬呬粙璐ㄥ唴瀛樺湪鑷敱鐢佃嵎銆傞櫎闈炰綘浠ュ悗杩涜鏇翠笓涓氱殑瀛︿範锛屽惁鍒欏緢闅剧鍒颁綋鍒嗗竷鐨勬潫缂氱數鑽枫傛瘮濡備綘棰樼洰閲岀殑杩欎釜棰橈紝浠嬭川灏辨槸鍧囧寑浠嬭川锛岄噷杈逛篃娌℃湁鑷敱鐢佃嵎锛屽彧鏈夋潫缂氱數鑽凤紝鍥犳鏉熺細鐢佃嵎鏄潰鍒嗗竷鐨勩傚鍥撅紝鍦ㄥ鐢靛満浣滅敤涓嬶紝鏃犳瀬鍒嗗瓙浼氳鎷夊紑锛屾湁鏋佸垎瀛愬憟瀹氬悜鎺掑垪锛岀粨鏋滃氨鏄笂...
绛旓細閭ｄ箞锛屼妇涓緥瀛愶紝鐢电娉㈠悜z鏂瑰悜浼犳挱锛屽叾鐢靛満娌跨潃x鏂瑰悜锛岀鍦烘部鐫y鏂瑰悜銆傜數鍦哄拰纾佸満閮藉湪涓嶅仠鍦板彉鍖栵紝涔熷氨鏄尟鑽°傞偅涔堝ソ浜嗭紝浣犻棶鐨勯棶棰锛岀涓涓蹇碉紝涓嶅簲璇ユ槸鐢电鍦鐨勫彉鍖栨柟鍚戯紝鑰屽簲璇ユ槸鐢电鍦虹殑鏂瑰悜鍚с鐢电娉㈢殑浼犳挱鏂瑰悜锛屽苟涓嶆槸鐢电鍦虹殑鏂瑰悜锛屾洿鍔犱笉鏄數纾佸満鐨勫彉鍖栨柟鍚戯紝浣嗘槸浣犲彲浠ヨ瀹冩槸鐢电鍦虹殑...
绛旓細鍑嗙‘璇达紝鏄釜甯哥煝閲
绛旓細鐢电娉㈠湪鐪熺┖涓篃鑳戒紶鎾 === 鎴戣涓篈D瀵 A鏄尝鍏辨湁灞炴с侭锛嶏紞锛鐢电娉㈢殑浜х敓鏄滅數纾佹尟鑽♀濓紝鏈烘娉㈢殑浜х敓鏄滄満姊版尟鍔ㄢ濄傛湰璐ㄤ笉鍚屻侰锛嶏紞锛嶅ソ鍍忔尝鐨勯熷害閮芥槸鐢扁滀粙璐ㄢ濆喅瀹氱殑銆傝瘯鎯筹紝鍦ㄧ┖姘斾腑锛屼笉鍚岄鐜囩殑鐢电娉紝濡傛灉閫熷害涓嶅悓锛屾垜浠墜鏈洪氳瘽鍙氨鏈闂鍜...鍛靛懙 ...
绛旓細瑙ｇ瓟锛氬瀭鐩翠簬鍗婂渾鐜墍鍦ㄨ酱绾跨殑骞抽潰涓妟=a澶勭殑鐢靛満寮哄害濡備笅
绛旓細鐢电娉㈡槸鐢卞悓鐩告尟鑽′笖浜掔浉鍨傜洿鐨勭數鍦轰笌纾佸満鍦ㄧ┖闂翠腑浠ユ尝鐨勫舰寮忕Щ鍔紝鍏朵紶鎾柟鍚戝瀭鐩翠簬鐢靛満涓庣鍦烘瀯鎴愮殑骞抽潰锛屼负妯尝涓旂數鍦鍜岀鍦鐨勬柟鍚戝澶勭浉浜掑瀭鐩达紝鏁匒D姝ｇ‘锛鐢电娉㈢殑浼犳挱涓嶉渶瑕佷粙璐紝鏁匓閿欒锛涘共娑夊拰琛嶅皠鏄尝鐗规湁鐨勭幇璞★紝鏁匔姝ｇ‘锛庢晠閫堿CD锛
绛旓細鍥句腑鐢垫祦瀵嗗害J鐨勬柟鍚戜笌鐢垫祦娴佸嚭鐨勬柟鍚戜笉鏄悓涓涓剰鎬濓紝鐢垫祦瀵嗗害J鏄┖闂寸偣鍑芥暟锛屽叾鍊煎拰绌洪棿鐨勭偣鏄竴涓瀵瑰簲鐨勶紝鑰岀數娴佹祦鍑虹殑鏂瑰悜灏辨槸鍚戝彸鑰屽凡銆
