一束白光在真空中通过双缝后在屏上观察到的干涉条纹，除中央白色

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一束白光在真空中通过双缝后在屏上观察到的干涉条纹，除中央白色亮纹外，两侧还有彩色条纹，其原因是

A．各色光的波长不同，因而各色光分别产生的干涉条纹的间距不同

B．各色光的速度不同，因而各色光分别产生的干涉条纹的间距不同

C．各色光的强度不同，因而各色光分别产生的干涉条纹的间距不同

D．上述说法都不正确

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