Answers

2016-01-30T14:13:53+05:30
∠I+∠E=∠A+∠D∠I+∠E=∠A+∠D Angle of incidence + angle of emergence = angle of prism (Normally 60∘) + angle of deviation.
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i am asking about equation angle of prism= r1 + r2
2016-01-30T14:51:14+05:30
Angle r1 + angle r2= angle of prism(A)
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yes i want proof of this equation