Question

A real and enlarged image can be obtained by using a:
A. Concave mirror
B. Convex mirror
C. Plane mirror
D. Either plane or convex mirror

Answer 1

Hint: Convex mirror is that part of a hollow sphere which is polished from inside. Concave mirror is that part of the hollow sphere which is polished from inside. A plane mirror can be defined as a mirror, which is flat or that has infinite radius and is polished from one side. These mirrors have unique properties and the nature and size of images depends upon the placing of objects i.e. their distance from the pole of the mirror.

Complete answer:
A virtual image is the image which can’t be obtained on a screen. This type of image is formed when we extend the diverging rays back so that they meet at a point, called the location of the image. This is possible in case of the mirror that can diverge the rays. Hence convex mirrors, which is also called diverging mirrors, can be used to form virtual images.

For real image the rays must be converging so that the image is formed where rays converge and a real image is formed. This is possible in case of the mirror that can converge the rays. Hence concave mirror, which is also called converge mirror, can be used to form real images.

Plane mirror forms a virtual image which is always unmagnified.

Hence, only a convex mirror can form virtual as well as enlarged image.

So, the correct answer is “Option A”.

Note:
The magnification or size can be determined only by location of image. A concave mirror not only forms a real image but also a virtual image. When the object is between focus and pole, the image is virtual and when the object is behind the focus of the mirror, the image formed is real.