Q. 21 B3.5( 8 Votes )
When the object is placed between F2 (in fig marked as F1) and optic centre then the rays coming from the object parallel to the principal axis after refraction will pass through focus. The ray passing through optic centre O will pass without deviation. The two refracted rays will never meet in real so the rays are extended backwards to get a virtual image. The image is formed beyond 2F behind the object and is virtual, magnified & erect.
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