1.

When a ray passes through a prism, refraction takes place as shown in figure:Here A is the angle of PrismNO is perpendicular on point X.N1O is perpendicular on point Y.(i) Angle α is-(a) (180° - 4)(b) (r1 + r2)(c) A/2(d) (i1 +i2)(ii) When a ray passes symmetrically through-a prism it suffers minimum deviation.Here ∠r is-(a) <A(b) 2A(c) A/2(d) α

Answer»

Correct answer is (i) (a) (180° - 4) (ii) (c) A/2



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