what is the bending of wave as it enters a new mater ial cal

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what is the bending of wave as it enters a new mater ial called?
A.reflection B.diffraction C.refraction D.interference
2.which of the following best describes image formation by a plane mirror?
A.A real image is formed in front of the mirror
B.A real image is formed behind the mirro.
C.avirtural image is formed behind the mirror.
3.what is the lowest point of a transverse wave called?
A.crest
B.compuression
C.wavelenght
D.trough

第一个选C,refreaction 折射
从一个介质到另一个介质,波的弯曲叫什么?--折射
第二个选A 平面镜反映的是镜子前的真像（不是虚像）
第三个选D trough 横波的最低点叫波谷
再问：谢谢谢谢我还有几个问题,我可以把我的所有的分数都给你之希望你能帮助我谢谢

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