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It is desired to obtain an erect image of an object using a concave mirror of focal length 20 cm. 

(i) What should be the range of distance of the object from the mirror? 

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

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

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(i) Range of the object distance is 0 to 20 cm from the pole. 

(ii) Image will be bigger than the object. 

(iii) Ray diagram:

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