A convex lens having focal length 20 cm. forms an image on a screen. If the height of this image is twice the height of object, then find the positions of object and image from the lens.

A convex lens having focal length 20 cm. forms an image on a screen. I

1.	A convex lens having focal length 20 cm. forms an image on a screen. If the height of this image is twice the height of object, then find the positions of object and image from the lens.
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A convex lens having focal length 20 cm. forms an image on a screen. If the height of this image is twice the height of object, then find the positions of object and image from the lens.

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