Question

A mirror having a very wide field of view must be

• A. concave
• B. convex
• C. plane
• D. none of these

Answer 1

The correct option is B

convex

Explanation for correct option:

B) Convex

1. The image formed by a convex mirror is always virtual, erect, diminished in size, and always form between its pole and focus.
2. For this reason, convex mirrors are used in automobiles and vehicles for getting a wide field of the rearview.

Explanation for correct option:

A) Concave
In the case of a concave mirror, when an object is at infinity, the image is formed at the focus on the side of the object and is real, inverted, and highly diminished. But we need a virtual and erect view of the rear.

C) Plane
In the case of plane mirrors, the image size is equal to the object size. So it does not give a wide view of the rear as compared to a convex mirror.

Therefore the convex mirror advances all other mirrors in this case.

Hence, the correct option is (B) convex