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)