7623(76日大)電子以v的速度在均勻且不隨時間變化的磁場B

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Uploaded by on Jul 21, 2008

(76日大)電子以v的速度在均勻且不隨時間變化的磁場B內,垂直於磁場而運動(1)設電子質量為m,證明此電子的角動量為 ,其中e為電子電量的絕對值。(2)假設電子的運動也遵守波耳對氫原子結構所作的一個假設,即電子的角動量 ,n為正整數,h為蒲朗克常數,則此電子由第一激態(n=2)躍遷至基態(n=1)時,若發射出電磁波,則其頻率為多少?

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