Question
Tue January 17, 2012 By:
 

sir/mam my question is that why is the white light split into a spectrum only when it passes through a prism and not a glass slab?

Expert Reply
Wed January 18, 2012
a glass slab can be treated as combination of two inverted prisms. so the light recombines in the second prism after dispersion in the first.
 
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