Question

why it happens that when we placed another prism in inverted position beside the first prism ,the spectrum get converted into a white light?tell me..

Answer 1

placing another prism in inverted position beside the first prism allowed all the colours of the spectrum to pass through the second prism. so the colours of the spectrum emerged from the other side of the prism as a beam of white light..

hope it helps u....

Answer 2

Because when a light travels through a prism,and an inverted cone is placed ,then they re emerge to form white light as if nothing had happend. I know it is complicated to answer this,and I think the answer to this question is beyond the scope of any class 10th's book.