A parallel beam of monochromatic light is incident at one surface of a equilateral prism. Angle of incidence is 55° and angle of emergence is 46°. The angle of minimum deviation will be
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a
Less than 41°
b
Equal to 41°
c
More than 41°
d
None of the above
answer is A.
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Detailed Solution
By the hypothesis, we know thati1+i2=A+δ⇒55∘+46∘=60∘+δ⇒δ=41∘ But δm<δ, so δm<41∘
A parallel beam of monochromatic light is incident at one surface of a equilateral prism. Angle of incidence is 55° and angle of emergence is 46°. The angle of minimum deviation will be