共振,共鸣 波长为什么在closed的管子里波长要乘以4 在open的管子里波长要乘以2

i think the first one shoule be "one side closed and one side open",the open end play a role of "anti-node" and close end is a node。therefore you should times 4。if both sides are open,both ends are anti-node,there are 1/2 of wave in it,therefore the "wave--length(which is the length of whole wave)" should times 2。楼主在国外留学吗。 再问： 是的 哈哈 再答： 我也是。再问： 加我QQ吧