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Why glass slab doesnot disperse white light |
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Answer» Thnqss When parallel-sided glass slab is placed in a beam of white light. Dispersion takes place inside the slab but, since the rays which emerge from the slab all run parallel to one another, the dispersed colours recombine to form a white light again and no dispersion is observed except at the very edges of the beam. It follows that the dispersion of white light through a parallel-sided glass slab is not generally a noticeable effect. |
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