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A full length image of a distant tall building can definitely be seen by using

(a) a concave mirror

(b) a convex mirror

(c) a plane mirror

(d) both concave as well as plane mirror



We’re looking at a distant building with a mirror. For the sake of using the simplest method, we’d want the image to be formed in the mirror, meaning, the image will be virtual .


Lets go through the options:

  • (a) a concave mirror - A concave mirror produces real, inverted and enlarged images when the object is placed close to the mirror, and extremely diminished images when placed at infinity.
  • (b) a convex mirror- A convex mirror produces a virtual, erect and diminished image . It would be perfect to clearly image a building at a distance.
  • (c) a plane mirror- A plane mirror would need to be as big as the building to be able to capture the full image, as it only produces images of magnification 1 .


So, the correct answer is (b)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo