A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror.

(b) virtual, behind the mirror and of the same size as the object.

Here, in case of concave mirror u=10 cm [u, is always negative] v =?;m = - 3 [real image] Now the magnification formula is m= -v/u or -3= -(v/-10) or , v = -30 cm. Image will...

At infinity.

The virtual image formed by a concave mirror is always magnified whereas the virtual image formed by a convex mirror is diminished.

Virtual and erect.

(b) concave mirror or convex lens.

(b) concave mirror or convex lens.

(c) both concave mirror and convex lens.

(a) Virtual image formed is larger in size in case of concave mirror.

(a) Real, inverted and same in size because object is at the centre of curvature of the mirror.