红光透过双缝在墙上呈现明、暗相间的条纹,若将其中的一条缝封

 红光透过双缝在墙上呈现明、暗相间的条纹,若将其中的一条缝封住,在墙上可以观察到(       )

A.条纹形状与原来相同,但亮度减弱       B.仍有条纹,但形状与原来不同

C.一片红光                             D.光源的像

 

答案

 B

 

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