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प्रश्न
Write a relation for the angle of deviation (δ) for a ray of light passing through an equilateral prism in terms of the angle of incidence (i1) angle of emergence (i2) and angle of the prism (A).
उत्तर
The relation is i1 + i2 = A + δ
Replacing i2 by e the angle of emergence.
i1 + e = A + δ or [δ = (i1 + e) - A]
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