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Question
Mon February 20, 2012 By: Mudita Singh

# Whose focal length will be more-a thin convex lens or a thick convex lens?How?

Expert Reply
Mon February 20, 2012
Its obvious that the focal lenghth of the thin lens will be high then the thick lens. As in your eye  when you see the object at very far distance the focal length of the eye lens become maximum and lens become thin.

The aperature is the diameter of the curve part of the lenst.it may effect .But one should focus on the radius of the curvature of the two lens surfaces R1 and R2.
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# in an experiment the focal length of a convex lens a student obtained a sharp and inverted image of a distant tree on the screen behind the lens.she then removed the screen and looked through lens in the direction of the object .she will see a) an inverted image of the tree at the focus of the lens b)no image as the screen is removed c) a blurered image on the wall of laboratory d0 an erect image of the tree on the lens pls explain me the answer elaborately

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