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[" An object of height "4.0cm" is placed...

[" An object of height "4.0cm" is placed at a distance of "30cm" from the optical centre "],[O'" of a convex lens of focal length "20cm" .Draw a ray diagram to find the position "],[" and sixe of the image formed.Mark optical centre 'O' and principal focus 'F' on the "],[" diagram.Also find the approximate ratio of size of the image to the size of the object."]

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An object of height 4.0 cm is placed at a distance of 30 cm from the optical centre 'O' of a convex lens of focal length 20 cm. Draw a ray diagram to find the position and size of the image formed. Mark optical centre 'O' and principal focus 'F' on the diagram. Also find the approximate ratio of size of the image to the size of the object.

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