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Geometrical Optics question

2013 · Shift 1 · Q53
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Geometrical Optics question

2013 · Shift 1 · Q53

JEE AdvancedPhysicsGeometrical OpticsMCQ+3 / −1
A ray of light travelling in the direction 12(i^+3j^){1 \over 2}\left( {\widehat i + \sqrt 3 \widehat j} \right)21​(i+3​j​) is incident on a plane mirror. After reflection, it travels along the direction 12(i^−3j^){1 \over 2}\left( {\widehat i - \sqrt 3 \widehat j} \right)21​(i−3​j​). The angle of incidence is
  1. A
    30 ∘^\circ∘
  2. B
    45 ∘^\circ∘
  3. C
    60 ∘^\circ∘
  4. D
    75 ∘^\circ∘
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