Question

The field view is maximum for?
A. Concave mirror
B. Plane mirror
C. Convex mirror
D. None of the above

Answer 1

Hint: We can solve this problem with the concept of image formation by spherical mirror. three types of mirror we used in the optical physics: plane mirror, concave mirror and convex mirror.

Complete answer:
Plane mirror has a plane reflecting surface and its focal length is infinite and optical power is zero. Image formed by this is virtually erect and of the same size as the object. Concave mirror has a concave reflecting surface and a convex mirror has a convex reflecting surface. Concave mirror is also known as a converging mirror because it converges the light rays. Convex mirror is also called a diverging mirror.

 Focal length formula for the mirror is $\dfrac{1}{F} = \dfrac{1}{v} + \dfrac{1}{u}$ , in this equation we use sign convention.

Field view defines the area visible from the perspective of the observer through the mirror. Field vision depends on many things such as the observer position with respect to the mirror, the length of the mirror and the observer's distance from the mirror.

Concave mirror forms a different image for a given object by changing the position of the object and it may be virtual or real, inverted or erect and small or large depending on the position of object while the convex mirror always forms a virtual, erect image whatever be the position of object.
We know that convex mirrors diverge the light rays therefore it can also collect the light rays from the wider field view. Hence the field view is maximum for the convex mirror.

So, the correct answer is “Option c”.

Note:
We know that convex mirrors have large view ranges so they are also used as rear view mirrors in vehicles which are helpful for the driver to see the traffic behind the vehicles. Convex mirror forms a virtual, erect and diminished image of the object which helps the driver in driving.