A concave mirror is used for image formation for different positions of an object. What inferences can be drawn about the following when an object is placed at a distance of 10 cm from the pole of a concave mirror of focal length 15cm ? (a) position of the image (b) size of the image (c) nature of the image Draw a labelled ray diagram to justify your inferences.

A concave mirror is used for image formation for different positions o

1.	A concave mirror is used for image formation for different positions of an object. What inferences can be drawn about the following when an object is placed at a distance of 10 cm from the pole of a concave mirror of focal length 15cm ? (a) position of the image (b) size of the image (c) nature of the image Draw a labelled ray diagram to justify your inferences.
Answer» Solution :Here u - 10 cm and f = -15 cm. (a) `(1)/(v) = (1)/(f) - (1)/(u) = (1)/((-15)) = (1)/((-10)) = (1)/(30) rArr v = + 30 cm` So, the image is formed behind the MIRROR at a distance of 30 cm from its pole. (B) MAGNIFICATION `m = -(v)/(u) = - (30)/(-10) = +3` Tt means size of the image is 3 times that of the object. (c) The image is virtual and ERECT. Ray diagram is drawn here.