[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fO5Syz2T6ffUmcPcJ4AUn1feFQTMrUEfMy84pea2wBpw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-10 00:31:57",56177991,[8,9,10,11],"φ2-φ1+(2π\u002Fλ)(r2-r1)=2kπ","r2-r1=kλ","φ2-φ1=2kπ","φ2-φ1-(2π\u002Fλ)(r2-r1)=2kπ",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},13,"279b1cf928ae41a2219be3163fee40da","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe22380515d0f9b05c595e41c8496ca04.png","大学物理（2023春季）","591a66e45cbb46beb91951e9697ad9a4","第11章机械波测验题","如图所示,两列波长为 λ 的相干波在 P 点相遇,S1 的初相位是 φ1,S1 点到 P 点的距离是 r1,S2 的初相位是 φ2,S2 点到 P 点的距离是 r2,以 k 代表零或正、负整数,则 P 点是干涉极大的条件为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feb535e82d4036d43e73bb989bfda3299.png\">",[21,32,38,41,50,59,68,76,85,94],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],56177989,[25,26,27,28],"0","π","π\u002F2","-π\u002F2","一平面简谐波,沿x轴负方向传播,x=0 处的质点的振动曲线如图所示.若波函数用余弦函数表示,则初相位为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0e712a4b6231381e01f82110502e3827.png\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":37,"source":30,"type":31},[],56177990,[25,27,26,36],"3π\u002F2","图为沿 x 轴负方向传播的平面简谐波在 t=0 时刻的波形,若波的表达式以余弦函数表示,则 O 点处质点振动的初相为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F30f308ace319d74c82352aec323a9b7a.png\">",{"answer":39,"createTime":5,"id":6,"options":40,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],56177992,[45,46,47,48],"波源的振动相位","波源的振动初相位","x处质点的振动相位","x处质点的振动初相位","波函数 y=Acos(ωt-ωx\u002Fu)中的 (-ωx\u002Fu) 表示",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],56177993,[54,55,56,57],"f(x, t)=Acos[a(x+bt)]","f(x, t)=Acos[a(x-bt)]","f(x, t)=Acosax*cosbt","f(x, t)=Asinax*sinbt","下列函数 f(x, t) 可表示弹性介质中的一维波动,式中 a、b和 A 是正的常量,其中哪个函数表示沿 x 轴负向传播的行波",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],56177994,[63,64,65,66],"16","4","2","1\u002F4","在同一介质中两列相干的平面简谐波的强度之比是 I1\u002FI2 =4,则两列波的振幅之比 A1\u002FA2 是",{"answer":69,"createTime":5,"id":70,"options":71,"question":75,"source":30,"type":31},[],56177995,[72,73,74],"P 点不可能是振动最弱的点","P 点不可能是振动最强的点","P 点既不可能是振动最强的点,也不可能是振动最弱的点","两列振幅相同的相干波在空间 P 点相遇,某时刻观测到 P 点的合成振动的位移既不等于这两列波的振幅之和,又不等于零,则可以断言",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":30,"type":31},[],56177996,[80,81,82,83],"-1","1\u002F3","1","3","一平面简谐波的表达式为 y=Acos2π(νt-x\u002Fλ),在 t=1\u002Fν 时刻,x1=3λ\u002F4 与 x2=λ\u002F4 二点处质元速度之比是",{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":30,"type":31},[],56177997,[89,90,91,92],"振幅相同,相位相同","振幅相同,相位不同","振幅不同,相位相同","振幅不同,相位不同","在驻波中,两个相邻波节间各质点的振动",{"answer":95,"createTime":5,"id":96,"options":97,"question":102,"source":30,"type":31},[],56177998,[98,99,100,101],"x=±kλ","x=±kλ\u002F2","x=±(2k+1)λ\u002F2","x=±(2k+1)λ\u002F4","沿相反方向传播的两列相干波,其表达式分别为:y1=Acos2π(t-x\u002Fλ) 和 y2=Acos2π(t+x\u002Fλ),叠加后形成的驻波波节位置坐标为"]