3-It is desired to obtain an erect image of an object , using an concave mirror of focal length 20cm. (i) What should be the range of the distance of 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.



1) in case of concave mirror,a virtual and erect image is formed only when the object is placed within focus or in the case, 0 between 20cm
2) her an enlarged/bigger image is formed
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