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In a Young's double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case |
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Answer» there shall be alternate interference patterns of red and blue. In Young.s original DOUBLE slit experiment, monochromatic light with definite frequency was used. Hence the two slits behave LIKE coherent SOURCES and they can produce stationary interference pattern on the screen. But here light WAVES emitted by two slits have different frequencies and hence different colours. Hence phase difference between them does not remain constant and so they behave like non-coherent sources. Hence they can not produce any stationary interference on the screen and so we do not obtain interference fringes. |
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