Laws of Reflection & Plane Mirrors questions with solutions

Showing 1–10 of 97 questions

• MCQmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A horizontal ray travelling along +x strikes the parabola y²=4ax and is reflected vertically upward. At the point of incidence P, what is the slope of the tangent?

  Options

  • Option A

    1

  • Option B

    -1

  • Option C

    0

  • Option D

    ∞

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• NumericmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A fixed incident ray reflects from a rotating plane mirror. If the reflected ray turns through 70°, through how many degrees did the mirror rotate?

  Your answer

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• MCQmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  Two plane mirrors are inclined at 70°. A ray incident on one mirror at angle θ, after reflection falls on the second mirror and is reflected from there parallel to the first mirror. The value of θ is:

  Options

  • Option A

    45°

  • Option B

    30°

  • Option C

    55°

  • Option D

    50°

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• MCQmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  In the given figure, incident ray AB is parallel to x-axis. The angle of reflection is :-

  

  Options

  • Option A

    30°

  • Option B

    60°

  • Option C

    45°

  • Option D

    None of these

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• MCQmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A horizontal ray travelling along +x strikes the curve y=x²/(4a) and is reflected vertically upward. What is the magnitude of the tangent slope at the point of incidence?

  Options

  • Option A

    1

  • Option B

    1/2

  • Option C

    2

  • Option D

    √2

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• MCQeasyGeometrical opticsLaws of Reflection & Plane Mirrors

  The light rays from an object have been reflected towards an observer from a standard flat mirror, the image observed by the observer are :-
  A. Real
  B. Erect
  C. Smaller in size then object
  D. Laterally inverted Choose the most appropriate answer from the options given below :

  Options

  • Option A

    B and D only

  • Option B

    B and C only

  • Option C

    A and D only

  • Option D

    A, C and D only

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• Multi-correctmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A stationary object is in front of a plane mirror moving normally toward it with speed u. Which statements are correct?

  Select all that apply

  • Option A

    The image moves with speed 2u relative to the ground.

  • Option B

    The relation xᵢ=2xₘ-xₒ applies along the normal.

  • Option C

    If the mirror has acceleration aₘ, the image acceleration is 2aₘ.

  • Option D

    The object-image separation remains constant.

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• Multi-correctmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A point object is placed asymmetrically between two ideal infinite parallel plane mirrors. Which statements are correct?

  Select all that apply

  • Option A

    Ideally infinitely many images are produced.

  • Option B

    Images occur in repeated families along the common normal.

  • Option C

    Some nearest-image distances depend on the object's position.

  • Option D

    All consecutive images are equally spaced regardless of how they are ordered.

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• Multi-correctmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A ray undergoes successive reflections from two plane mirrors that are perpendicular to each other. The ray lies in the plane perpendicular to the mirrors' line of intersection. Which statements are correct?

  Select all that apply

  • Option A

    After one reflection from each mirror, the final ray is antiparallel to the initial ray.

  • Option B

    The net change in propagation direction is 180°.

  • Option C

    The result is independent of the initial ray angle, provided both reflections occur.

  • Option D

    The final ray is always parallel and codirectional with the initial ray.

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• MCQmediumGeometrical opticsLaws of Reflection & Plane Mirrors

  A plane mirror of semicircular shape (radius = 1 m) is placed in y-z plane with its diameter along y-axis and centre at origin. A point object in the form of light source is placed on the axis of mirror at point (5, 0, 0). At a distance of 10 m from plane mirror there is a wall also parallel to y-z plane. The ratio of area of spot of light on wall to that of mirror is

  

  Options

  • Option A

    9

  • Option B

    10

  • Option C

    8

  • Option D

    18

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