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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
A laser beam is incident on a flat/plane mirror at some angle and results in a reflected beam. The mirror is now rotated by an angle $\delta$ while the direction of incident laser beam is kept the same. The angle between the new reflected beam and the reflected beam before the mirror was rotated is
  • ✓
    $2 \delta$
  • B
    $0$
  • C
    $\delta$
  • D
    $\delta / 2$
✓

Answer

Correct option: A.
$2 \delta$
a
(A)

If mirror rotated by $d$ then reflected beam will rotate by $2 \delta$.

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