How to find the nature of the image formed ( I'm all cases ) ?
The size of the image can be identified by using the magnification formula for the mirror.
h(image)/h(object) = (-d(image)/d(object)
‘h’ here is the height, and ‘d’ is the distance from the pole of the mirror.
For nature of the image, you have to know that a convex mirror forms:
Unlike concave mirrors, convex mirrors always produce images that share these characteristics. The location of the object does not affect the characteristics of the image.
For concave mirror, it always forms only real images, except when the object is kept in front of f, when it forms a virtual image.