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What type of image/images are formed by:(a) a convex mirror?(b) a concave mirror?
(a) A convex mirror always forms virtual, erect, and small-sized images.
(b) A concave mirror can form:
1. virtual, erect and large-sized images
2. real and inverted images of any size (small, same size, or large)
Explanation
A concave mirror is a mirror that is curved inward in the middle. It is also known as converging mirrors, due to the fact that when parallel incident rays fall on the surface of the mirror, the rays will reflect and meet at a particular point and form the image.
Depending on the position of the object with respect to the mirror, the types of images it forms are real, inverted as well as virtual and erect image, also the size of the images formed are magnified, diminished as well as the same size as that of the object.
| Images formed by a Concave Mirror |
| Position of the Object $(u)$ | Position of the Image $(v)$ | Size of the Image | Nature of the Image |
1. At Infinity | At Focus $(F)$ | Highly Diminished | Real and Inverted |
2. Beyond Centre of Curvature $(C)$ | Between Focus $(F)$ and Center of Curvature $(C)$ | Diminished
| Real and Inverted |
3. At the Center of Curvature $(C)$ | At the Center of Curvature $(C)$ | Same Size | Real and Inverted |
4. Between Focus $(F)$ and Center of Curvature $(C)$ | Beyond Centre of Curvature $(C)$ | Enlarged | Real and Inverted |
5. At Focus $(F)$
| At Infinity | Highly Enlarged | Real and Inverted |
6. Between Pole $(P)$ and Focus $(F)$ | Behind the mirror | Enlarged | Virtual and Erect |
A convex mirror is a mirror that is curved outward in the middle. It is also known as diverging mirrors, due to the fact that when parallel incident rays fall on the surface of the mirror, the rays get diverge, and give a wider field of view.
It always forms virtual, erect, and diminished images irrespective of the distance between the object and the mirror.
| Images formed by a Convex Mirror |
| Position of the Object $(u)$ | Position of the Image $(v)$ | Size of the Image | Nature of the Image |
1. At Infinity | At Focus $(F)$ | Highly Diminished | Virtual Point size |
2. Anywhere on Principal Axis | Between Pole $(P)$ and Focus $(F)$ | Diminished
| Virtual and Erect |
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