NDA2025General AbilityGeneral ScienceActual
An object is placed between infinity and the pole (P) of a convex mirror. The position of the image is
Options
- Abetween pole (P) and the focus (F), behind the mirror
- Bbetween the focus (F) and infinity, behind the mirror
- Cbetween the pole (P) and the infinity, in front of the mirror
- Dat the focus (F), behind the mirror
Correct answer
A. between pole (P) and the focus (F), behind the mirror
Step-by-step solution
Using the mirror formula: 1 v + 1 u = 1 f 1 v = 1 f - 1 u For a convex mirror, the focal length f is positive ( f > 0 ). The object is placed in front of the mirror, so the object distance u is negative ( u Since f > 0 and u 1 f . This implies that v 0 , we have v > 0 . Thus, 0 Answer: between pole (P) and the focus (F), behind the mirror