A metal plate containing an illuminators circular aperture is placed at one end of an optical bench and a screen, at the other end. By means of a convex lens the image of the aperture is formed on the screen, the diameter of the image being 4 cm. If the lens is displaced 17.5 cm along the optic bench, an image of the aperture again appears on the screen, the diameter of the image being 2.25 cm then match the following:
Column-I | Column-II | ||
(A) | Focal length of the lens in cm | (P) | 122.5 |
(B) | Diameter of the aperture in cm | (Q) | 3.3 |
(C) | Distance between the aperture and the screen in cm | (R) | 3 |
(D) | Power of lens in dioptre | (S) | 30 |
Text Solution
Verified by ExpertsA
Diameter of the aperture 
Magnification, 
Distance between the aperture and screen
Focal length of the lens 
Power 
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