Question

Rohit wants to have an erect image of an object, using a converging mirror of focal length 40cm. 

(i) Specify the range of distance where the object can be placed in front of mirror. Give reason for your answer. 

(ii) will the image be bigger or  smaller than the object ? 

(iii) Draw a ray diagram to show the image formation in this case.

Answer 1

(i) The object has to be placed at a distance between 0 - 40 cm . This is because the image is virtual, erect and magnified when the object is placed between F and P.

(ii) The image will be bigger than the object. 

(iii)

Answer 2

(i) Object should be placed at <40 cm (Less than 40 cm) in front of the mirror, i.e. between focus and pole, as concave mirror forms a virtual, erect and magnified image when object is placed between focus and pole.

(ii) The image will be bigger than the object.