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4. Thicker in the center
than edges.
– Lens that converges
(brings together) light
rays.
– Forms real images and
virtual images
depending on position of
the object
The Magnifier

5. • Lenses that are thicker
at the edges and
thinner in the center.
– Diverges light rays
– All images are
erect and reduced.
The De-Magnifier

7. The line joiningthe centres of the two spheres C1C2 of
which thelenses form a part is called the principal axis.

16. Very Far off
Beyond 2F
at 2F at 2F
Beyond 2F
Much larger than the
object