A convex lens of focal length 10 cm and a concave lens of same focal length in value are placed co-axially at a separation of 20 cm as shown in figure. A point object is at infinity on the principal axis. Take the optic center of convex lens as origin of co-ordinate system and the principal axis as x-axis as shown in figure.If the concave lens is moved vertically downwards through a distance of 5 mm, then the co-ordinatesof the final image after refraction through the two lenses is

A convex lens of focal length 10 cm and a concave lens of same focal l

1.	A convex lens of focal length 10 cm and a concave lens of same focal length in value are placed co-axially at a separation of 20 cm as shown in figure. A point object is at infinity on the principal axis. Take the optic center of convex lens as origin of co-ordinate system and the principal axis as x-axis as shown in figure.If the concave lens is moved vertically downwards through a distance of 5 mm, then the co-ordinatesof the final image after refraction through the two lenses is
Answer» (15 CM, -0.25 cm) (10 cm, +0.25 cm) (25 cm, -0.5 cm) (15 cm, +0.5 cm) ANSWER :A

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