A curved mirror, whether concave or convex, has a focal point where parallel rays either converge (concave) or diverge (convex). This point, called the focal point, is crucial in understanding image formation and optical properties of curved mirrors.

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(a) The height of the image produced when the object is at C will be less than h’. The magnification is more when the object is at point P than at C.

(b) To find the distance between the two images we need to find the image distance when the object is at P and when it is at C.

To find the image distance when the object is at P:

u = -30 cm

f = -20 cm

Using mirror formula v1 = – 60 cm

To find the image distance when the object is at C:

Since C is the centre of curvature, image distance = object distance (i.e.) v2 = – 40 cm.

Distance between the images = |v2| – |v1| = 60 – 40 = 20 cm