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CBSE Class 12-science Answered

a convex lens made of glass from a sharp image on the screen for a particular position of object wi
Asked by | 21 Dec, 2008, 08:39: PM
answered-by-expert Expert Answer

this is because the size of the puple, i. e., the aperture of the eye lens and there by its focal length, is controlled by the iris which automatically expands or contracts depending on the obkects.

Answered by | 22 Dec, 2008, 10:41: AM
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