如图所示,两块相同的玻璃等腰三棱镜ABC置于空气中,两者的AC面相

如图所示,两块相同的玻璃等腰三棱镜ABC置于空气中,两者的AC面相互平行放置,由红光和蓝光组成的细光束平行于BC面从P点射入,通过两棱镜后,从a、b两点射出。对于从a、b射出的这两束光下列说法正确的是                                           (    )

    A.从a、b两点射出的两束光不平行

    B.从a、b两点射出的两束光仍平行,且平行于BC

    C.从a点射出的光比从b点射出的光更容易使金属产生光电效应

    D.从b点射出的光比从a点射出的光更容易观察到单缝衍射现象

答案

B


解析:

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