Shift,Doppler
《英文msh詞典》Shift,Doppler
[入口詞] Shift,Doppler
[主題詞] Doppler Effect
[英文釋義] Changes in the observed frequency of waves (as sound,light,or radio waves) due to the relative motion of source and observer. The effect was named for the 19th century Austrian physicist Johann Christian Doppler.