Question:
An object is placed in front of a screen and a convex lens
Last updated: 6/11/2023
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An object is placed in front of a screen and a convex lens is placed at a position such that the size of the image formed is 9 cm When the lens is shifted through a distance of 20 cm the size of the image becomes 1 cm The focal length of the lens and the size of the object are respectively 750