Q3 of 223 Page 209

An object is placed at a distance of 6 cm from a convex mirror of focal length 12 cm. Find the position and nature of the image.

Object distance = 6 cm

Focal length = 12 cm


Uisng mirror formula,


Image distance = 4 cm behind the mirror


The natue of the image is Virtual and erect


Magnification , m = v/u = 4/6 = 0.66 ,


Hence the image formed is diminished.


More from this chapter

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1

An object is kept at a distance of 5 cm in front of a convex mirror of focal length 10 cm. Calculate the position and magnification of the image and state its nature.

 2

An object is placed at a distance of 10 cm from a convex mirror of focal length 5 cm.

(i) Draw a ray-diagram showing the formation of image.


(ii) State two characteristics of the image formed.


(iii) Calculate the distance of the image from mirror.

 4

An object placed 20 cm in front of a mirror is found to have an image 15 cm

(a) in front of it,


(b) behind the mirror.


Find the focal length of the mirror and the kind of mirror in each case.

 5

An arrow 2.5cm high is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. Find the nature, position and size of the image formed.