å¦æç²åå¨ç£åºéåçæ¯å®å
¨
åå¨è¿å¨çæ´ä¸ªå¨æ为T=2Ïm/qBï¼å¦ææ¯ä¸å®å
¨åå¨è¿å¨çè¯ï¼t=θT/2Ïï¼Î¸ä¸ºå¨ç£åºé转è¿ç弧度ï¼ï¼æé¢ä¸»ç说æ³åªé让ç²åå¨ç£åºé转è¿çè§åº¦æå°å³å¯ï¼å
·ä½çé®é¢éè¦æ¿é¢æ¥è¯´è¯ã