If A is angle of prism, D is angle of deviation; i is angle of incidence and e is angle of emergence through a prism, then the correct relation between them is *
A + i = D + e
A + D = i + e
A + e = D + i
A + i + e = D
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I think 2 option is correct I wish it becomes correct, see the attachment too
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option 2 is correct hope it helps you
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