Q9 of 223 Page 198

Describe the nature of image formed when the object is placed at a distance of 20 cm from a concave mirror of focal length 15 cm.

Here, u = - 20 cm; f = -15 cm

Define linear magnification produced by a mirror.

Write down a formula for the magnification produced by a concave mirror.

(a) in terms of height of object and height of image

(b) in terms of object distance and image distance

Fill in the following blanks with suitable words :

(a) If the magnification has a ______ sign, then image is virtual and erect

(b) If the magnification has a ______ sign, then the image is real and inverted

An object is placed at a distance of 10 cm from a concave mirror of focal length 15cm.

(a) Draw a ray diagram for the formation of image.

(b) Calculate the image distance.