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Q34 (NDA-II/2011) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Geometrical optics Answer Verified

The image formed by a convex mirror of a real object is larger than the object

Result
Your answer: —  Â·  Correct: D
Explanation

A convex mirror is a diverging mirror that always produces a virtual, erect, and diminished image of a real object, regardless of the object's distance (u) from the mirror [c1, c4]. According to the mirror formula 1/f = 1/v + 1/u, for a convex mirror, the focal length (f) is positive and the object distance (u) is negative for real objects. This results in an image distance (v) that is always positive and less than the focal length (|v| < f) [t1, t8]. Consequently, the magnification (m = -v/u) is always positive and less than one (m < 1), meaning the image height is always smaller than the object height [t1, t10]. Therefore, there is no value of u for which a convex mirror produces an image larger than the real object [c4, t3].

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 9: Light – Reflection and Refraction > Activity 9.5 > p. 141
  2. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 10: Light: Mirrors and Lenses > Snapshots > p. 165
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