Where can the position of an object be if a concave mirror forms its erect and virtual image ?

You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror

The focal length of a concave mirror is 30 cm.Find the position of the object in front of the mirror,so that the image is three times the size of the objects.

Use the mirror equation to deduce that: (a) an object placed between f and 2f of a concave mirror produces a real image beyond 2f. (b) a convex mirror always produces a virtual image independent of the location of the object. (c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole. (d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.

Use the mirror equation to deduce that: (a) An object placed between f and 2f of a concave mirror produces a real image beyond 2f. (b) A convex mirror always produce a virtual image independent of the location of the object. ( c) The virtual image produced by a convex mirror is always diminished in size and it located between the focus and the pole.

A point object O is placed midway between on the common axis of two concave mirrors of equal focal length. If the final image is formed at the position of the object, the separation between two mirrors is ........ . Focal length of mirrors is f. HINT:- A situation is depicted n the figure [ Note : A another possible situation for which object and its image coincide is when distance between mirrors is 4f ] .

A short object of length L is placed along the principal axis of a concave mirror away from focus. The object distance is u. If the mirror has a focal length f, what will be the length of the image ? You may take L lt lt |v- f|.

A plane mirror and an object has speeds of 5 m//s "and" 10 m//s respectively. If the motion of mirror and object is along the normlal of the mirror then the speed of image may be:-

A thin rod of length f//3 is placed along the optic axis of a concave mirror of focal length f such that its image which is real and elongated, just touches the rod. The magnification is "_____________"