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KCET2019PhysicsRay Optics

A certain prism is found to produce a minimum deviation of ( 38^ . ) It produces a deviation of ( 44^ ) when the angle of incidence is either ( 42^ ) or ( 62^ ). What is the angle of incidence when it is undergoing minimum deviation?

Options

  1. A49
  2. B( 30^ )
  3. C( 60^ )
  4. D( 40^ )

Correct answer

A. 49

Step-by-step solution

(A) ( D=38^ ) ( i= A+D 2 ) ( d= (i₁+i₂ )-A ) ( 44-(104)=-A ) ( A=60^ ) ( i= 60+38 2 = 98 2 ) ( i=49^ )

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