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When monochromatic light is replaced by white light in Fresnel's biprism arrangement, the central fringe is
When monochromatic light is replaced by white light in Fresnel's biprism arrangement, the central fringe is
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Solution
The correct option is C white
When white light refracts from the biprism, all colours would form coherent sources at different positions according to their refractive indices. However the position of their central fringe would be same, and hence they would all combine at that position to again give a white fringe.
When white light refracts from the biprism, all colours would form coherent sources at different positions according to their refractive indices. However the position of their central fringe would be same, and hence they would all combine at that position to again give a white fringe.
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