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Clearnote
Q&A
Senior High
Physics
求解🙏🏻
Physics
Senior High
11 monthsago
妍
求解🙏🏻
波前 -等深線(深) "波前 測量血液流速的血流儀是以都卜勒效應為原理製成。若血流儀的感測器以頻率為f的聲波或光波入射到血 液,感測器靜止放置在皮膚表面,已知血液的流動方向使血液中的物質接近感測器,若監測血液流速的光波其特 性代號如下表所示,則在相同的介質之中,入射波與反射波特性的關係,何者正確? (靜止.0移動 三波速 波長 頻率 週期 入射波特性代號 入I Ti 反射波特性代號 VR 入R fR TR (A) VI > VR (B) fi fr (C) TI<TR (D) > 入R (E)入1=入R。 5
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