A convex lens makes a real image 4 $cm$ long on a screen. When the lens is shifted to a new position without disturbing the object, we again get a real image on the screen which is $16\ cm$ tall. The length of the object must be

Question

Dr. Abubacker · Accepted Answer

(b) $O = \sqrt{I_{1}I_{2}} = \sqrt{4 	imes 16} = 8\ cm$

Q. A convex lens makes a real image 4 $cm$ long on a screen. When the lens is shifted to a new position without disturbing the object, we again get a real image on the screen which is $16\ cm$ tall. The length of the object must be

Explanation

Reviewed by Dr. Abubacker

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