Why is a convex mirror used as a rear-view mirror in vehicles?

Question

Why is a convex mirror used as a rear-view mirror in vehicles?

I. It always forms an erect and diminished image.

II. It provides a wider field of view as it is curved outward.

III. It forms a real image of objects behind the vehicle.

1. A. II only
2. B. I and II only (Correct answer)
3. C. I and III only
4. D. I, II and III

Correct Answer

Option B — I and II only

Detailed Solution & Explanation

The correct answer is I and II only.

Key Points

• Convex mirrors form erect, diminished virtual images (not real).
• They curve outward giving a wider field of view.
• Statement III is wrong (forms virtual, not real images).
• I and II are correct reasons.