2015年普通高等学校招生全国统一考试物理(浙江自选)
浙江自选模块物理部分“物理选修3-4”模块(10分)13.(1)(4分)以下说法正确的是(单选)( )A.真空中蓝光的波长比红光的波长长B.天空中的彩虹是由光干涉形成的C.光纤通信利用了光的全反射原理D.机械波在不同介质中传播,波长保持不变答案:C解析:七种颜色的单色光,红光波长最长,A项错误;彩虹是光的折射现象,B项错误;同一频率的波在不同介质中,波的波长不同,D项错误。本题正确选项为C。(2)(6分)某个质点的简谐运动图象如图所示,求振动的振幅和周期。答案:A=10√2cm,T=8s解析:由题图读出振幅A=10√2cm①简谐运动方程x=Asin(2πTt)②代入数据-10=10√2sin...
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