Question: An object 4.0 cm in size, is placed 25.0 cm in front of a concave mirror of focal length 15.0 cm. (i) At what distance

An object 4.0 cm in size, is placed 25.0 cm in front of a concave mirror of focal length 15.0 cm.
(i) At what distance from the mirror should a screen be placed in order to obtain a sharp image?
(ii) Find the size of the image.
(iii) Draw a ray diagram to show the formation of image in this case.

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