Question

List four specific characteristics of the images of the objects formed by convex mirrors ans concave mirrors...

Answer 1

CONVEX MIRRORS:

1. They always produce virtual, diminished (smaller than object) and erect (with respect to object) images for real objects.
2. The image is always formed on the opposite side of the mirror as the object and is always formed between the focus and pole of the mirror.
3. Sign convention: The radius of curvature and thus focal length are positive and the focus is 'virtual'.
4. If a virtual object is placed at its focus it produces a parallel beam of light. A parallel beam of light seems to diverge from the focus of such mirrors, hence they are called divergent mirrors. 

CONCAVE MIRRORS;
1. They always produce real and inverted images except when an object is placed between the mirror pole and the focus which gives erect virtual images. (for real objects)
2. They produce magnified, diminished and same size images. 
3.A parallel beam of incident light is concentrated on its focus and thus such a mirror is called a convergent mirror. Also a light source placed at the focus produces a parallel light beam.
4.Sign convention: The focal length and radius of curvature are taken as negative.