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Ray Optics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsRay Optics1 Mark
MCQ
A ray passes through a prism of angle $60^{\circ}$ in minimum deviation position and suffers a deviation of $30^{\circ}$. What is the angle of incidence on the prism
  • A
    $30^{\circ}$
  • ✓
    $45^{\circ}$
  • C
    $60^{\circ}$
  • D
    $90^{\circ}$
✓

Answer

Correct option: B.
$45^{\circ}$
$i=\frac{A+\delta_m}{2}=\frac{60^{\circ}+30^{\circ}}{2}=45^{\circ}$

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